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How to safely bring koi indoors for winter? Tank size, feeding, water.

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish

I was wondering on how I could safely move my koi fish into my home for the winter with a tank. I have two koi that are about five inches long. We weren't shure how big of a tank to get , how to feed them , and how to keep the water clean. Help? By the way we are keeping them in a bucket until we can get the right tank.

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 7th, 2017

Anything less than a 100 gallon tank would be insufficient for koi of your sizes. They can be fed as you feed outdoors. Filtration would be critical to maintain water quality. A combination of mechanical, biological and chemicals filtration would be required.

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