Pond Boss Forums AERATION Should I aerate? Bottom Diffuser year round?

Water is densest at 39°F and sinks. Temps above and below that are llighter and "float". Having the diffuser up off the bottom allows the warmer water to collect at the bottom and not get mixed with the upper, cooler water. While winter aeration keeps ice off the pond, allows gasses to escape, and allows sunlight into the water for oxygen generation via phytoplankton, you have to get the diffusers into shallow water to avoid homogenizing the whole water column like you want to do for summertime aeration. The fish in the pond need a relatively "warm water" refuge to escape to for the winter.