Private Pond Fish Problems

[doolay]

Agreed, sounds like lack of oxygen. If the pond has a lot of algae cells roaming around during the summer and when the ice comes on they can die and fall to the bottom. So when the pond ices over there isn't much oxygen coming into the lake and the algae start to decompose, that decomposition will use up all the oxygen in the pond extremely fast, the dead fish will also decompose and use up oxygen. Large populations of fish can also use up a lot of oxygen. So the mix of decomposition and respiration has probably caused your fish kill.
[signature]