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very true about how the covering up to reduce temp loss also reduces oxygen input and degassing
i was thinking more a fan that was hooked up to some ducting or pvc piping that came from your house or garage or basement or wherever the temp is suitable.
maybe a bit of trouble depending where your pond is..but i reckon the heating bill would be lots less this way.
i know that in aquaculture food grow out, under high loads, that oxygen is used direct from oxygen bottles to the recirc system, systems in which hold about 40 kilos fish per cubic metre.
they are either injected into a venturi, ozontaor, fractionator, the biofilter or run into the top of a pyramid unit that has the oxygen exposed to a water flow constantly, this reduces waste and allows for near to 100% efficency as it doesnt bubble off but stays until it dissolves into the water.
gives about zero temp loss.
where i live oxygen is about five times dearer than america. atleast so im told that oxy bottles are everywhere in america.
we had a guy from america showing the technology and the costings.. he was like " oh you guys have to pay too much for your oxygen."
so i wouldnt recommend this unless cash is not a problem.
i spose if you have stock thats worth thousands and thousands it might be worth it to have the temperature and other parameters fluctuating minimally.
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