Originally Posted By: txelen
Some of the users here have had luck running a bottom diffuser hooked to a thermostat so that it keeps the pond cool running when air temperatures are below 70F or so.


I tried that earlier this year and while it probably oxygenated the lower water, it also heated it up by mixing it with the warmer, upper level water. That was with the compressor set to turn on at 70° and below.

I figured out where the thremocline is in the pond yesterday, and my next step is to suspend the diffuser a couple feet above that level. Hopefully I won't see the trout in the shallows like I did when bottom aerating.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).