Also, the koi pond plants remove nitrogen that exists in the water,
along with phosphates which makes them a great filtering system.
free floating so more difficult to protect from nibbling koi. Water Hyacinth. Water Lettuce. Water Lily. Lotus. Water Poppy. Umbrella Plant. Water Iris. Horsetail.
Here are some of the most effective clear water plants. Oxygenating Pond Plants. Floating Pond Plants.
Variegated Water Celery. Water Iris. Water Cress. Pickerel Plant. Taro. Water Lilies.
The best plants for a koi or goldfish pond, including information on
top plant species, plant benefits, planting advice, and how to stop koi eating
Do koi ponds need plants?
Aquatic plants are considered an excellent addition to any koi pond.
Aquatic plants, in fact, help increase oxygen production in the
water, helping to keep the pond properly aerated for koi. …
The shade plants provide reduces incoming light into the pond and
thus limits photosynthesis of algae.
What plants are good for fish ponds?
Creeping Jenny Pond Plants. Often used as a ground cover in terrestrial gardens, Creeping Jenny fares excellently when used in water gardening applications. … Pickerel Pond Plants. … Horsetail Pond Plants. … Taro Pond Plants. … Cardinal Flower. … Water Lettuce. … Mosaic Plant. … Blue Irishornwort
Hornwort- is a very popular submerged aquatic plant among the aquarium enthusiasts due to their hair like foliage and hardiness.
It is also known as Coontail, cedar moss, fish blankets, horn weed,
morass weed, rigid hornwort etc.
It is native to North America but it has now a worldwide distribution due to the aquarium and pond trade.
It occurs in ponds, lakes, ditches, quiet streams and marshes with
moderate to high nutrient levels where the water bottom contains
mud, some sand or rocky materials.
It generally occupies 0.5 to 15.5m depth ranges of the water body.
It has muscular and hair-like foliage that helps oxygenate and
clarify the water as well as keep algae growth to a minimum.
Nelumbo nucifera, also known as Indian lotus, sacred lotus, bean of
India, Egyptian bean or simply lotus, is one of two extant species of
aquatic plant in the family Nelumbonaceae. Wikipedia
Do Koi eat plants?
Plants for Koi Ponds. … This is because koi are omnivores and eat plants.
This is not so much a problem when putting koi in an established pond with many plants already in it.
But, it can be a big problem when adding a few plants to an established koi pond.
How do I make my pond water clear naturally?
Use a biological filter. A biological filter uses bacteria to remove
organic waste that can accumulate in your pond. .
Add barley straw to your pond. As barley straw decomposes, it
releases a chemical that prevents algae from growing. …
Add plants to the pond.
How to choose Pond plants in your garden ponds landscaping
koi pond plants As well as enhancing the look of a pond, pond plants help to maintain water
quality, providing a healthy environment for the fish.
The choice of plants will partly depend on the style of pond—a naturalistic pond looks best when heavily planted
around the edges so that it blends seamlessly into its environment, while a contemporary look may be best achieved with more minimalist planting.
A well-balanced, healthy koi pond must contain two types of plant: oxygenators , which release oxygen into the water, and floating plants , which provide shelter from sunlight.
Without these, or an efficient filtration system, the water in the koi pond can become overgrown with algae, which not only turns the water green, but can also affect the health of some fish species, such as Sterlets
Plants in the body of the pond also absorb nitrate— the product of the breakdown of fish waste—which lessens the burden on the filtration system.
Incorporating plants into a koi pond is not Incorporating plants into a koi pond is not straightforward,partly because of the depth of water, and also because koi have a habit of digging up plants and browsing on the growing shoots.
Most koi ponds, therefore, simply incorporate a few tall marginals, and perhaps some water lilies, whose leaves help to protect the fish from sunburn in the clear water.
Planting In a new pond, wait several days after filling before putting the plants in place, to allow the water temperature to rise to that of the environment.
Pot plants as necessary (see opposite), having first inspected them closely for any signs of disease or pests.
In temperate areas, spring is the best time to introduce new pond plants into an existing pond, because aquatic plants start to grow rapidly at this time.
If the pond is large, you may need waders to put plants in place, and special pond gloves should always be worn.
These reach up to your shoulders and provide protection against waterborne diseases, such as Weil’s disease a potentially serious condition, spread by rodents, which causes jaundice.
TYPES OF KOI POND PLANTS
Plants for the pond can be divided into four categories, based on their growing habits and where in the pond they are to be found.
Oxygenating pond plants, water lilies,and floating pond plants are truly aquatic, growing in or under the water.
Marginal plants are a useful addition to the pond, not only as a decorative element,but also to provide an excellent habitat for insects.
Traditional, formal ponds often incorporate lowgrowing plants, such as water lilies, which do not mask the crisp, neat edges of the pond.
Small ponds often benefit from the inclusion of taller, more architectural plants, such as reeds and grasses, which lift the eye, making the pond appear larger.
Three varieties of water lily (Nymphaea ‘Escarboucle’, ‘William Falconer’, and Marliacea Albida’) adorn this large, formal pond, which is bordered by the tall, elegant spikes of Iris laevigata ‘Variegata’, Canna flaccida, and Schoenoplectus lacustris.
Myriophyllum verticillatum covers one corner of the pond.
The vertical emphasis of the planting in this courtyard pond, achieved through the use of tall marginals, such as irises and rushes, enhances
the geometric lines of this modern style, while a single water lily (Nymphaea ‘Gladstoneana’) softens the look and provides cover for the fish.
Creative landscaping Edging around a pond strengthens its perimeter and helps to disguise the edge of the pond liner.
It can also prolong the life of the liner by shielding it from sunlight.
Hard construction materials, such as paving slabs or bricks, laid around the edge of a pond give a more formal look,
while natural stone or sod are ideal for a more informal pond. Another possibility is a wooden deck raised above water level,
but the wood must first be treated with a nontoxic preservative to keep it from warping or rotting.
Consider the access to the pond: if this is across a lawn, regular foot traffic can quickly result in an unsightly muddy trail.
If you do not want to construct a path, set paving slabs into the grass as an informal solution.
The planting and landscaping around the pond can be used to disguise pond equipment. An external filter, for example,
can be hidden in vegetation in a flowerbed, although it must still be easily accessible for routine maintenance and servicing.
Moving water A fountain is an attractive addition to any pond, and also creates a healthier environment for the fish by improving the water’s oxygen content.
Water lilies prefer calm water, however, and will not thrive under the jet of a fountain, so they need to be located at the opposite end of the pond.
Water currents created by the fountain can waft floating plants to one side of the pond; before adding plants, test
the flow by floating a light plastic ball on the surface of the water while the koi pond fountain is operating.
If the ball drifts away from where you want the plants to be, adjust the positioning of the fountain.
Oriental-style koi ponds often incorporate bridges and decorative features of Japanese life, such as bonsai trees and
this popular style of bamboo water fountain (left). Japanese maples create a striking backdrop to the pond, and can be grown in pots or in the ground.
Reference from Encyclopedia of Aquarium and Pond Fish D Aldeton DK 2008
hardy pond plants
Hardy Pond Plants. Hornwort, Bundle of 5. 3.4. Frogbit, Bundle of 3. 4.0. Water Hyacinth, Bundle of 3. 4.3. Grower’s Choice Hardy Water Lilies. 4.2. Virginalis Hardy Water Lily. Red Stemmed Parrots Feather, Bundle of 5. Jumbo Water Hyacinth, Bundle of 3. Pickerel Rush, Bundle of 2.
Will pond plants survive winter?
No other varieties will survive the winter. After their leaves turn brown, hardy marginals (bog plants) can be trimmed back.
Never cut plants with hollow stems off below the water level,
because they will die if completely submerged (cattails, rush, and pickerel rush).
Will water lettuce survive winter?
Unless you live in a climate that doesn’t freeze, floating plants like
hyacinth and water lettuce won’t survive the winter. …
If you leave them in the pond, the dead plants will decompose and
cause water quality issues through the wintertime.
How do you overwinter tropical water lilies?
Tropical Water Lilies
Keep them actively growing by placing them in warm water with bright light and warmth.
It will be difficult to maintain a minimum water temperature of 21°C (70°F). …
Over-winter a tropical Lily by letting the tuber go dormant. Leave the plant in the pond until after a killing frost.
Do water lilies die off in winter?
Although tropical water lilies do go dormant in winter, they are
only hardy to about USDA Hardiness Zone 9.
They will freeze and die if left in a cold pond over winter. … You can move your water lilies to smaller pots for the winter, if you like. Lift the plant and trim back some of the leaves and roots
Your family is expanding to include a dog and koi fish. You are over the moon with glee over the new addition(s), but you are nervous about how they will get along.
Do dogs like koi fish? Do koi fish like dogs? Will they live in harmony together? What should I add to the pond to keep birds of prey away? What happens if my dog does eat my koi fish?
All of these are common questions, and all will be answered thoroughly. Here is your ultimate guide to having both a dog and koi fish as pets.
What should I know about koi fish?
First things first: Let’s talk about the benefits of having a koi fish.
While they may not always be deemed a classic pet, those who bring them into the family fall for their charm. In an outdoor garden pond or aquarium, koi fish can be an incredibly calming addition.
While many people think they are related to goldfish, koi fish are actually more closely related to the common carp.
Koi fish can grow very large. In fact, with proper care, koi fish can grow up to be somewhere between two and three feet in length. So, if you are thinking of introducing a koi fish into an existing pond, then you need to think carefully about whether or not your pond is large enough to sustain a full-grown koi.
Additionally, on average, a pet koi will survive to be between 20 to 30 years old. However, it has been recorded that some koi live for more than 200 years! Can you imagine that?
In order for your koi fish to live a long time and to have a healthy life, they must exist in a healthy environment that boasts high-grade filtration and water quality, and no sharp edges as they can injure themselves.
How do you make sure your koi fish aren’t stressed? Ensure that the water quality is right, there are no parasites around, and that they have plenty of space to swim around.
You may be surprised to hear, but koi fish are so friendly that they may even break the surface to say hello to you. If they do, pat them on the head and hand feed them.
How do dogs usually act when seeing a koi pond?
Generally, upon first seeing a koi pond, dogs have the urge to shoot around it and examine the sturdiness of the stones around the side. You should absolutely let them do this, in order to get them comfortable with having it in the back garden.
While running around, your puppy or dog may also sniff at the water, and maybe even jump around on the rocks and in the streams. Eventually, dogs will grow confident enough to jump into the pond, except of course, if they hate water, like cats.
Cats notably hate water, and even if they rest along the edge of your pond, they won’t have sufficient support or ability to stretch all the way into the pond and grab a fish. That being said, both cats and dogs will perch and watch fish for hours as if hypnotized.
Will my dog eat my koi fish?
To be clear, yes, most dogs will consume a koi fish if they witness an available opportunity. Let’s say that a koi fish is out of the pond, flopping around on the grass; you better believe that your dog is going to go and investigate (and perhaps get a mid-afternoon snack).
However, most dogs won’t put in the necessary effort required to actually catch koi from a pond. And, even if they do attempt to, the majority of dogs will be incredibly unsuccessful.
Only if a dog has incredible hunting abilities and speedy reaction times will he or she be able to grasp and devour your koi from the pond.
The most likely scenario is that your dog chooses to sit for hours looking into the pond and watching the koi. When you first introduce your dog to the koi pond, take the time to examine how he or she acts to be able to adequately ascertain whether he or she is sincerely pursuing the koi, or merely enthralled by their beautiful color and graceful movement.
How do I hinder my dog from eating my koi fish?
That being said, you want to take as many security measures as possible for preventing your dog from eating your koi fish. The steps you need to exert will depend on your particular dog and how they tend to behave.
Install a special mesh netting placed across the pond. It will not only protect your fish from your dog, but also from a variety of predators. The downside to this is that some dogs may get themselves trapped in the net.
Opt to install motion sensors that emit sound or streams of water when something (your dog) approaches. This tends to startle dogs and stops them from going any further into the pond.
Have sprinklers around the pond that can be set to begin at regular intervals.
If my dog does eat my koi fish, will he be safe?
Just for a worst-case scenario: If your dog does manage to eat a koi fish, what will happen?
Well, koi fish aren’t necessarily harmful to your dog; in fact, they contain protein and oils that will be beneficial for your dog. However, the small bones inside the koi fish will be the issue. These small bones can be very dangerous for dogs as they may become stuck in their throat and damage their stomach and intestinal tract.
If your dog consumes any kind of raw fish, this can lead to diarrhea and vomiting. Furthermore, if the koi fish had a parasite, this will also be transferred to your dog.
In other words, you really don’t want your dog to be consuming your koi fish.
Will my dog protect my koi fish?
One of the benefits of having a dog and koi fish is that your dog may actually protect the pond. As long as he or she doesn’t consider hunting and eating the koi fish, then your dog will most likely shoo away other animals who want to.
For example, herons and racoons regularly target koi in small ponds as they are such easy prey. But, if your dog barks or chases these birds and animals away, then they are a lot less likely to come back and attempt to snatch a morning meal.
A dog can actually be a beneficial addition to your koi pond security force!
Should I add a fish cave to the pond?
Every homeowner with a koi fish pond should opt to have at least one fish cave or “koi house” placed inside it. Both of these additions give your koi fish a location to retreat to in order to shelter themselves from predators.
A koi house is usually a sturdy mesh cage that lies on the bottom of your pond, while a fish cave is virtually concealed from sight in some part of the pond. Both of these cages and caves can also be placed underwater and will work as a hideaway spot for your koi fish, just in case your dog or another animal does invade the pond.
If a predator approaches your pond, the koi will swim into their cage or cave, and remain there until the predator leaves.
You should definitely add at least one of these areas for your koi fish, just in case your dog does decide to show off his swimming skills.
What else should I add to the pond to ensure the safety of my koi fish?
Even if you don’t have a dog, you still really need to put in some effort and planning for ways to protect your koi pond from other predators. Luckily, there are a lot of tried and tested manners through which you can do this.
In addition to rock caves, you should look into adding these to your koi pond.
● Mechanical and biological filter
One of the most significant problems that your koi fish may encounter is parasites. These bacteria can be lethal for your koi fish, and it is crucial that you do your best to keep them protected. In order to keep the parasites at bay, install a good mechanical and biological filter in your pond to ensure your fish remain protected from parasites and other diseases such as fin rot and ulcers.
● Natural bacterial sponges
By adding natural bacterial sponges (such as Anacharis plants) to your koi pond, you will encourage healthy bacteria to grow.
● Floating mesh
One of the easiest ways to prevent predators from grabbing your beautiful fish is to purchase some floating mesh. This UV resistant black polypropylene material ties around the edge of your pond and will be almost invisible. So it won’t block your sight of the pond, but it will mean that other animals can’t stretch into it.
● An electric fence
If you are really concerned about the safety of your koi fish, then you may want to add an electric fence around the edges of your pond. If you are considering this, keep in mind that an electric fence can be incredibly dangerous for children and dogs and is still useless when it comes to birds of prey.
● A scarecrow
One of the oldest tricks in the book, if you live in an area with a lot of birds of prey, you may want to put up a scarecrow near the pond. Whether you DIY it at home or you purchase it from a store, a scarecrow is always an effective way to scare off birds. However, other animals may become used to it, and therefore it won’t hinder them too much.
Do koi enjoy residing with other fish?
As a matter of fact, koi are actually very gentle, social fish and they very much enjoy living in pairs or groups. If you want to add other breeds of fish to the pond, you can be assured that the koi will be welcoming and won’t try to eat or fight with the new additions.
However, if you are considering adding other breeds of fish, you need to make sure that they will be just as friendly back to the koi fish.
Also, keep in mind that the new fish require the same habitat as your koi and that their nutritional requirements are the same.
How do I ensure they live in harmony?
If you follow all these above tips, there is a very good chance that your dog and your koi fish will be able to live in absolute harmony together. While it may take a little bit of time (and trust) between the two of them, your dog will eventually begin to accept the pond and the fish that are swimming around in it.
Just like with anything you add to their scenery, over time, the koi pond will become familiar to your dog, and they will lose interest. They may even stop staring at the fish so incessantly when they realize that they aren’t going to play with them. In other words, soon enough they will be back to the ball!
So, there you have it, the ultimate guide to having a dog and koi fish as pets! As you can hopefully tell, it isn’t impossible to have both, and with a few precautions in place, your family can include both a four-legged furry friend and an elegant finned friend.
Do you have a dog and koi fish? What are your experiences regarding getting them to live in harmony? Do you have any tips or tricks? Let us know in the comments below! We would love to hear from you!
Farah Al-Khojai is the Managing Partner of Pet’s Delight. A passionate entrepreneur, Farah holds a Bsc in Government from the London School of Economics. She is always on the lookout for new opportunities to develop and grow the pet and equestrian retail and wholesale market in the UAE and beyond, and is proud to be at the helm of the first and the largest pet care provider in the market representing world-class brands including Orijen, Applaws, Hunter, Savic, Flamingo, Ruffwear and Rogz.
Koi Diseases How to diagnose and treat common koi fish diseasesKoi fish are very hardy, robust fish and don’t often once become sick once they have settled into the koi pond.koi disease occurs in ponds as fish fall prey to parasitic,
bacterial or fungal attacks.The causes of koi fish diseases varied and can range from a sudden
drop in water temperature, predator attacks and spawning to name a few.No matter what the cause of the koi diseases, one thing remains
constant – the sooner you recognize and begin to treat the problem
…the more likely you will be successful treating the koi diseases.Regular pond maintenance and water-quality checks
help keep diseases away from fish, but illnesses still
occur, even in the best-kept ponds.The first sign of a problem may be a fish floating at the surface, by
which time it is probably too late for effective treatment.For this reason, it is vital to set up a routine for examining
fish; feeding time provides an ideal opportunity to
check their appearance and behavior.So how do you know if you have a sick koi fish? Sometimes the signs
that a fish is sick are very subtle, such as one fish segregating itself
away from other fish, or not eating very much.As time passes and the koi disease gets worse, the symptoms become more obvious and may spread to other fish.
The health of pond fish influenced by environmental
conditions.During spells of hot weather, for example, evaporation can lower
water levels, which has the effect of concentrating dissolved nitrogenous waste.Atthe same time, elevated temperatures drive oxygen out of the
water; the combination of nitrate and oxygen stress can be
fatal, especially for larger fish.Many of these problems can avoided by topping off
water levels during the summer, and incorporating a
pump and filter; these improve water quality, break down waste,
and increase oxygen content by creating water movement.Overstocking a pond, especially if it is not well established, places
great stress on its occupants, and fish may succumb to usually
benign bacteria that are present in the water.Overfeeding is another common environmental problem,
especially in temperate areas in the spring and fall; uneaten food
decomposes in the water, encouraging populations of pathogens.It turns out that Koi is quite hardy for ornamental fish. But, on
several occasions when there is irregularity in water quality, things
may become quite rough for them.Among the most major disease for Koi is Ich parasite or white spot disease.This disease will make the fish look like they have been
sprinkled with white salt all over their body.This parasite will attach to the skin, and eat them alive for several
weeks before they detach themselves and move to other host.There are several disease affecting them as other fish, but there is
one virus, which affected Koi and common carp but not other species.That viral disease called Koi herpesvirus (KHV) or cyprinid herpesvirus 3. Most of the fish infected with this virus will die but some may survive.Those who survive will be the carrier and may send the viral
infection to other non-infected fish.In this case, most of the breeders that have Koi diagnosed with KHV
in their farm will need to take harsh action to cut all the population to avoid the spreading.
fish diseases pictures
Gill rot fish diseases pictures
This disease occurs the most of all the koi diseases.Irrespective of conditions of breeding or sizes of koi, it occurs.It often does at high temperature above 20 degrees centigrade, but
sometimes below the temperature, tooThe disease advances . before the diseased koi fish loses its weight, it dies, that is before the fish shows any symptom, it dies.In such a case if you open the gill, you will find red gill filaments turn grey or muddy, or some of them broken.The germ is columnaris. Its treatment is oral administration of sulfadrugs or antibiotic substances or a medicated bath of furan drugs.Aquatic terramycin is very useful
fish diseases pictures Anchor worm disease
Red swellings appear under the scales.When the tip of a swelling pulled, a worm with an anchor-shaped top comes out.The worms stick to fins, mouths and the hypoderm.Sometimes fifty or sixty worms live on a fish and weaken it to death.Dipterex is efficacious to exterminate them.
fish diseases pictures raised scales
Liquid stays under the scales and puses them up.
The scales bristle up. liquid stays also in the abdomen and the body swells. The diseased koi fish looks like a pine cone.First a part of the body affected, but gradualy the disease spreads all over the body. Eyes of the diseased koi fish protrude.It breathes hard, swimming around in crazy manner.After a day or two the fish dies, overtunring on its back.The Doitsu happens to affected by the disease, but it recoversIts causes supposed to be some bacteria, interruption in blood
circulation caused by a disease blood vessel or internal orga, some
medicines and excessive eating of live foods.It occurs often in the spring when oxidized pupae given to koi.When the water temperature is high, it breaks out. Any fish, either fry or adult, affected in dirty water.Sulfa drugs, anitbiotics and furan drugs are efficacious. It is also helpful to break blisters and apply monafracin with Dipterex to the part.It is important to find the disease in its earl stage, otherwise it will be difficult to cure it.White spot disease
Small white spots appear all over the body. They increase gradually and the body seems to be covered with the white powder.
The extreme case is that the outer layer of the skin comes off and the diseased koi grows weak to death.
Its germ is Ichthyophthirus, about 0.7 millimeter long, egg-shaped. Treatment for the disease is a medicated bath of franese for seven days.
About one-month-old fry are apt to be affected. by Myxospridea just after they begin to be fed artificial bait.
A gill opens wide and shows red swollen gill filaments. The diseased fish breathes agonizingly and dies.
The disease spreads rapidly and many fries die. It the disease heals, the jaws of the affected koi will be deformed.
Koi older than two years old are not affected by it because they are immune against it.
The cause is Myxospridea. No medicine is efficacious against it.
For prevention the water of the pond is to be disinfected with
malachite green early June and minced fresh meat of aan immunized
koi aginst Myxopridea is to be given to the koi in the pond. It will be carried on for a week.
This treatment is effective enve after a koi becomes ill. The blood of teh minced koi prevents Mixospridea from growning.
Abrasion, Aquatic mold, Aquatic germ, Coton coverThe germs have many mycelia of which bottom parts stay inside the skin of a diseased koi fish.The upper parts live in the water. They look like fur. The extreme case is that they enter deep inside, and the fish grows weak and dies after two to seven days.The disease often breaks out in a pond where too many fish are put or the water is dirty.Weak or wounded koi are easily affected by the disease. Its germs are Sapro legniasis and Achlyasis.Treatment for the disease is to wash and remove the germs in 1.5 to 2.5 NaCl solution.Remove the fur-like mycelia and apply 2% mercurochrome to the affected part.Then put the koi fish in a medicated bath of monafuracin for fish. A medicated bath ofNitrofurazone is also efficacious
How do you treat fungus on fish?
Treat for 5 consecutive days. Repeat until symptoms clear.Secondary infections are also common and can be treated with
antibiotics or general cures like Tetra Ick® Guard® or Tetra® Fungus Guard®.Consistent temperature and good water quality
will help prevent infections, in addition to using aquarium salt. learn more at http://www.tetra-fish.comCan salt cure fish fungus?This is the reason that body fungus infections are not seen on saltwater fish.Adding 1 tablespoon of noniodized rock salt to each gallon of water is helpful in effecting a cure. …Salt will kill aquarium plants and snails, but this should not be a
problem if you are treating the infected fish in a separate container.What keeps fungus from growing on fish’s body?Prevention. You can easily prevent body fungus. The fungi that cause this disease are considered “opportunistic” infections.This means that the fungi lives in most aquarium water, and even
on the skin of most aquarium fish, without causing disease.Is fungus on fish contagious?Because fungus is not contagious, infected fish can be moved to a
quarantine tank for treatment away from other livestock.This is the recommended approach for systems where some of the
livestock are intolerant of antifungal medications.What causes fungus on fish?The infection is usually caused by the fungus Branchiomyces and
can cause the entire gill to rot away.Infections usually occur in stressed fish that are living in tanks with
high levels of ammonia or nitrate.How do you treat fish fungus in a pond?Make an un-iodized salt dip by using Pond Salt (available at your local pond retailer).Dissolve 2.5 cupfuls of Pond Salt in 10 U.S. gallons of pond water making a 2.0% solution.Gently place fish in a soft nylon net, then lower them into the salt dip for 5 to 10 minutes, no longer.Fish lice disease A koi with fish lice swims as if it were jumping in water, scrubs itself
against rocks or swims along the walls of the pond.Being examined closely, it has worms about 5 millimeters long and 3 millimeters wide often on fins.They make the fish weak and causes some other diseases of which it dies.The technical term of a fish louse is Argulus foliaccus. It can be exterminated by Dipterex
Bladder diseaseA koi with this disease struggles to go up to the surface, sinks down to the bottom or turns itself upside down.It loses the sense of equilibrium and cannot swim in a normal position.The causes are that swelled intestines press the air bladder because
of indigestion, that indigestion makes the body weak as the
temperature falls and that fatty degeneration of an air bladder.It is difficult to cure it. Tumor of reproductive organsHuge koi are apt to be affected by the disease.The diseased koi has a large tumor in its abdomen which gradually
gets larger and affects the skin Finally the tumor breaks and the fish dies.Especially the tumor in the first half of the body seems to be malignant.It is a malignant tumor of the genital gland. Particles like cancer virus are found in it.The tumor should be found and removed in its early stage. Examination of the texture is necessary as soon as it is found.Spinal paralysisAgricultural chemicals such as Dipterex, over-feeding or electric
shocks from the submersible pump motor or lighting cause koi spinal paralysis.They become crooked. It is difficult to cure it, but sometimes it heals naturally.Keeping the diseased fish in a large pond is an effective treatment. Gas bubble diseaseIt occurs when the water temperature is high in the summer. Fry often suffer from it in green water.Gas bubbles appear on the head or the fins and sometimes eyes
protrude, supersaturation of oxygen in water causes the disease.It can be prevented by adding water to the pond or making a shade over it.When aeration or heating is working in a tank, they must be well-controlled not to cause the disease. Dystrophy of the backThe back of a diseased koi caves in along the dorsal fin. The line of the backbone shows itself clearly.Its mortality rate is not high. Koi affected by the disease are weak against oxygen shortage or wintering.They are apt to get scraped or molded. The cause is said to be degenerate fat of pupae.A report tells the disease resembles men’s sugar diabetes pathologically.Vitamin E drugs are used for its treatment but it is very difficult to cure it.