Pond Boss Forums MANAGING AN EXISTING POND Feeding Should I be feeding trout now?

Wood - I also cannot explain why you do not get any open water from the aerator. It may be due to the bulbling action of the boil not being violent enough or it not lifting enough water water from the bottom into the surface boil. However this may be very good in your case not having open water. This way your water under the ice may not get quite as supercooled compared to when it gets exposed to subzero air. The bubling action of the diffuser may create enough dissolved oxygen into the water to prevent a winter kill of your trout. Time will complete your aeration story from Alberta.

PS. In the new issue of Lake and Reservoir Management (Vol.19(4)2003) the article by Miller & Mackay (University of Alberta) "Optimizing Artificial Aeration for Lake Winterkill Prevention", they found that surface aerators did a better job of preventing fish winterkill than bottom diffusers in a study of 6 lakes.