The Four Seasons and Your Koi Pond

The Four Seasons and Your Koi Pond

Four Seasons


Your Koi pond will literally come to life at the first of springtime.

The life in your pond have spent the previous Winter in a
proverbial hibernation, and is ready to come to life at the first signs of warm weather.

This is the perfect time to begin maintenance on your pond before
the fish, plants, and other pond life come back to live from their winter slumber.

As the days begin to get warmer, your pond will start drastically changing.

If you are not careful, you may miss this much needed opportunity to perform maintenance. Generally, watch for temperatures around 50 degrees, as this is the perfect time.

Spring time is a very weak time for your fish, because they have not
eaten for months, and have may be living on a low level of energy.

This cause your Koi to be more susceptible to attacks from
organisms such as bacteria, parasites, viruses and fungi.

This makes Spring the opportune time to take all preventative measures possible.

Adding a large spectrum of treatment solutions will greatly reduce
the amount of disease causing pests and material.

Once the temperature warms up, another dose of this treatment
will ensure that your Koi will be well protected while they
redevelop their immune systems.

Once temperatures warm up, your Koi immune systems will be
effective enough to protect themselves from disease.

learn more about  cleaning koi pond in spring


Fall brings a change to your pond, as the majority of plant life begin to change.

Fall is a time you move all plants that cannot withstand lower temperatures indoors, or in a green house.

Another issue during fall is leaves. Falling debris will have to be cleared more then any other time during the year.

Skimming the pond daily will help maintain a healthy, clear pond. Alternatively, you may want to invest in a pond cover.


Winter is coming, and this will be the first Winter that you go through with your Koi pond.

Think of Winter as a down period for your pond, as less events happen during Winter then any other time.

However, there are special precautions that you need to take before
Winter arrives, to ensure that your pond and fish survive.

You will need to feed your fish far less during the winter months. Talk with your local pet store to determine how often you should feed your Koi.

Prepare for cold weather by investing in the items you will need during the summer.

Koi have been known to withstand constant temperatures as low 39
degrees, and temperatures slightly lower then 39 degrees, for short periods of time.

When buying a heater, remember to research what size you will
need to adequately heat your pond during the winter, otherwise ice
will still form, causing potentially dangerous amounts of gas in the
water, due to it being trapped under the ice.

In extreme events, it may be a good idea to have an emergency tank inside available.


Summer is considered one of the best and more vibrant times for your Koi pond.

Temperatures are beautiful, and you are more able to enjoy your
pond then during the cold winter months.

However, by no means, should your maintenance drop during the summer months.

Remembering a few things during the summer months will ensure
that your pond stays beautiful and lively.

During the summer months, the oxygen level in your pond actually decreases.

Proper precautions should be taken, especially if you live in an area
where temperatures stay high for the majority of the year.

If you witness your Koi hanging out towards the top of the water,
and they seem to be gasping for air, this may be a good indication
that your pond does not have a high enough concentration of Oxygen.

Not unlike other situations in life, heat brings on potential parasite and illness.

The majority of parasites are not seeable by the naked eye, so instead, you must watch your Koi for signs of illness.

You may notice strange behaviors in your fish such as rubbing
against objects, scratching, shaking, or shivering.

Each symptom could indicate a different type of illness, so it is important to watch closely.

If any type of change is noticed, contact your local vet, pet store, or Koi dealer as soon as possible.

While some parasites will cause little damage, some illness such as
KHV or Koi Herpes Virus have a high mortality rate, and should be treated as soon as possible.

learn more koi pond summer maintenance about

The Four Seasons and Your Koi Pond FAQ

Are koi ponds expensive to maintain?
Koi demand a large environment, and this can cost a great deal as well. Generally, the ideal size for a Koi pond is considered to be over 1,000 gallons and at least three feet deep. Size: Koi fish need a lot of space.

Can Koi survive winter?
Goldfish and koi are very hardy fishes; they can survive water temperatures as low as 0°C, which means they can survive in the pond during the winter as long as it doesn’t freeze solid and they have adequate water quality and oxygen.

Are koi ponds high maintenance?
While koi fish may be known for their grace and beauty, few know that they are also one of the dirtiest and high-maintenance fish to own. Because they like to root up the pond’s bottom surface, and because they produce a lot of waste, koi pond water can easily become mucky and dingy.

How long can Koi go without food in winter?
During the summer, koi can easily go two weeks without being fed. They will take some small amount of nutrition from bugs, algae, and anything else they can find in the water to eat. Koi can go through the entire winter without eating, and should not be fed if the water temperature is 52 degrees or colder.

Koi are capable of surviving through an entire winter in a frozen pond, provided their water has sufficient oxygen. Poor-quality water will not sustain koi if they are frozenon top, as they will not be able to surface in order to breathe. Survival under ice is possible for koi; many wild populations do so.
Are koi fish hard to take care of?
Koi grow quickly and get very large. Keep mature koi in an outdoor pond of at least 3 feet deep, with at least 50 gallons of water per fish. … If you’re introducing koi to an existing school in an aquarium or pond, quarantine the new fish in a separate body of water for 2 to 4 weeks to be sure they are healthy.

How do I keep my koi pond from freezing?

Danner Manufacturing, Inc. Floating Pond De-Icer With 18-Foot Power Cord, 120 watt, #02175

The snow, ice, and surrounding earth will help insulate your pond from the frigid air. 5. De-Icer: If your pond threatens to freeze completely, you may need to install a de-icer to keep at least part of the water above freezing. Your fish will need a few feet of liquid water in the pond throughout the winter. learn more How to keep koi fish alive in winter

Learn more about Koi Fish Facts

Author: Giovanni Carlo

I am a koi fish keeper and breeder a husband of beautiful wife Maybel and beautiful daughter May Carl I have been in fish keeping hobby for over 35 years. Like many kids in the 80's We catch fish in the rivers and canals and kept it in the "pasong" local visayan name for pond. or a large mayo bottle since We don't have aquariums yet on that time. decades later their is a small petshop open in my place and that starts me from buying aquarium and fishes that are sold in the pet store decades later start growing goldfish and koi fish until today.

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