Pond Boss Forums GENERAL QUESTIONS Help aeration

I'm in Northern Illinois. Right or wrong, here is how I do it and have had no fish kills (knock on wood).

I have two diffusers, one deep and one shallower. During the summer I run them both at night. During the winter I only run the shallow one and then only when I have heavy snow cover, long period of cloudy days or when the ice is real thick and opaque.