Over the winter, cooler months def more evaporation, and notice less when it's warmer.  I just haven't seen a huge difference to date.  That said, I plugged the ato back in, pump ran for 5 secs then stopped.  Salinity is 1.026.  Guess the evaporation has finally slowed down....guess it was just timing of this happening. 
		
	
		
		
		
		
		
	
		
		
	
	
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