The diffuser in the picture is currently sitting in 60" of water in my shallow end, the boil rocks back and forth sending waves out across the pond, the boil height bounces around from 3" to 7". To be honest I haven't taken deeper water temps to see if I have a thermocline but my deep diffuser usually only runs at night and is also sitting 30" off the bottom. My deep diffuser is also sitting in a 36" deep plastic sump pump pit with holes around the top. I only run my diffusers during the day during emergencies such as when a strong summer cold front rolls in, or more recently when chemicals get drifted onto the pond. My surface temp this morning was 69.5F, this evening it was 75F, so far this year I have only hit the low 80s for a few days.

Last edited by Shorty; 06/26/19 09:54 PM.