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[QUOTE="Craig58, post: 146344, member: 4545"]
This is only true in the winter when the overall pond water temps drop below 39F.  Above 39F the cooler water still sinks and warmer water rises.

Any water with a temp above 39F will attempt to rise.  Water heated on the bottom of the pond with a heater will attempt to rise and will rise until it is chilled below 39F at which time it will begin to sink again.

I think you have been doing exactly what has been preached.  Air stones moved to shallow areas, (within a foot of surface) and pumps moved closer to surface so as not to pull bottom water.

In a sense Charles is right however.  Once the ice provides an insulating layer, the water below the ice behaves the same whether it is in Texas, Montana or the Arctic Circle.  The big difference is how hard it is to keep a hole in the ice and how long pond can remain frozen over.  That's probably the bigger issue for Wayne.  But with a clean pond bottom, that issue becomes minimum too.

I'm still excited to see Wayne's bottom water temps this winter and how he makes out.  I'm really keeping my fingers crossed for him!

Craig
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