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Original Post (Thread Starter)
Thermostat controlled aeration to control heating #528680 12/09/2020 6:01 PM
by DannyMac
For a southern pond: I use my aerators in part to control the pond temperature, timing for night in the summer and daytime in the winter. If a blue norther is blowing in at 2 pm, the aerator runs per its timer or until I turn it off. I just got this idea that a thermostat controlled switch would allow automatic operation. Even better, a delta T controlled switch, set for air temp versus water temp. In winter, run for air minus water = 5 degrees or more. In the summer, the delta T may not be useful, but using just an air temp switch, say set to cut in at 84F, the night time aeration is optimized. A separate switch based on surface water temperature could be effective, for example not allowing the run until the surface water is cooled off to 85F. Well golly, now my "thermostat switch" needs multiple temperature inputs to a little "pi" computer, that outputs on or off, dials and data recorders for monitoring actual temperatures (a phone app for same, lol), multiple setpoint knobs, two waterproof sensors with long wires, and a weatherproof box.
Liked Replies
Re: Thermostat controlled aeration to control heating #528683 Dec 9th a 06:14 PM
by esshup
I'd love to see a chart of daytime ambient temps vs. water temps vs. aeration run time a month or two into the project.
1 member likes this
Re: Thermostat controlled aeration to control heating #528726 Dec 10th a 06:17 PM
by jpsdad
Originally Posted by DannyMac
But to the extent possible, I don't want to add heat to the pond and I don't want to exceed 85F through the depth.

So are you saying you aren't trying to cool the water but rather prevent the mixing of the warmer water at the surface until it has fallen below 85F?

Good idea but there should be a fail safe that aerates after a certain time if the condition is never met. Even up here in DFW we get night time lows higher than that.
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