was this a tank that had only been running for 5-7 days or you made some changes to the tank and the new check valve was only on for 5-7 days? 
		
	
		
		
		
		
			
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				260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065,  2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).  http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here  http://www.vimeo.com/2304609 and here  http://www.vimeo.com/16591694
			 
		
		
		
		
	
		
		
	
	
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