What is the smallest size pond for koi?
What is the smallest size pond for koi? Minimum pond size for koi: 6ft x 8ft x 4ft is the smallest pond you should consider for koi Fish. This is due to the size and space they will require as they grow. You will need to consider the longterm size and growth rate of your fish when planning and building a pond for Koi Carp. Can you keep koi in a small pond? The Minimum Requirements For Keeping Koi In A Small Pond. With adult koi fish, the minimum pond size requirement is around 1,500 gallons and three feet deep....