How To Care For Koi Fish In The Winter. Winter Tank Setup. While koi can handle cold temperatures they cannot handle being frozen like some frogs can.
To flourish and thrive long-term koi fish need clean filtered water in their ponds. There are several ways to take care of your Koi in the winter. Generally three rounds of culling will be done and the entire batch of fish will be cut down by between one half or three fourths if not even more steeply.
Placing a de-icer and air stone in the pond.
The rule goes a koi pond should hold 500 to 1000 gallons of water for every adult koi it carries. The below example is a greenhouse built to cover the entire pond in Winter. Placing a de-icer and air stone in the pond. Placing a de-icer and air stone in the pond.