Pond Boss Forums AERATION Should I aerate? aeration in winter

Bill D., take a thermometer and check the water temp. A few years ago I thought that air going into the pond would change the temp. Like aerating at night only when the night time temps were below 70 to help keep trout alive.

On the contrary, I found that the water actually warmed up faster because of the upper and lower water temps mixing and the trout croaked faster than if I were not to aerate at all.

I even purchased a special thermostat that would turn on the aerator when temp fell below 70, and turn it off when temps climbed above 70.

Air being injected into the pond via an aeration system, by itself, does not change the water temp enough that you can measure it. It will change the water temp by making more of the water volume contact the ambient air, but in the winter, warmer water sinks. So if you have the diffuser placed in shallow water like is recommended, you will not disturb the deeper, warmer water.