Avoid overcrowding your fish. Having too many fish in your pond can lead to poor water quality, resulting in illness and fish deaths

Avoid overcrowding your fish. Having too many fish in your pond can lead to poor water quality, resulting in illness and fish deaths

Koi and goldfish can survive in ponds over winter provided it is adequately deep to give them plenty of room under the ice and an opening is maintained in the ice to allow oxygen into the pond and carbon dioxide to escape.