Rainbow trout, Brook trout, and fathead minnows are currently in my 14 foot deep pond. 0.6 acres currently running 24/7 aeration with 2 diffusers. For recommended winter aeration, I was all set to turn off the deep water diffuser to prevent super-cooling and keep the shallow water diffuser running in 3 to 4 feet of water for a hole in the ice. Then, I read this thread:

https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=478466#Post478466

Cody mentions that trout can tolerate super-cooled water and the extra DO from the deep water diffuser is a good thing.

Now I am confused on which way to go. Keep the diffusers as they are and super-cool the deep water, or not?

Also, when do you change over to a winter shallow water only aeration scheme? When ice is likely to form and linger, or at a specific water temperature? My water is currently 54 deg F. The weather forecast for next week is lows in the mid 20's, highs of 40. If I do the winter scheme, I am thinking to change over now.

Last edited by Knobber; 10/29/23 08:11 AM.