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					Originally Posted by Delphinus
					
				 
				What's the evaporation like in a heated outdoor pond given our relative humidity at "negative 10%" in the wintertime?  Do you drop in buckets of water or do occasional water changes?  (I don't have a pond so I actually have no idea how you guys do it?) 
			
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 You know what Tony ... we dont touch the pond till spring ... they feed off the algae or whatever is in there and we do a water change in the spring ... the trough heater only keeps it from freezing so the water is still chilly.