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					Originally Posted by rossb
					
				 
				I tried the trough heater last fall and although it kept the pond clear we estimate it cost 40 bucks to keep a 2000 gallon pond open in November.  It would be less if you also covered the pond.  
  
			
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 That explains why we did not notice a bump in the electricity ... our pond is only maybe 400G  ( not really sure as it is irregular in shape )    
