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					Originally Posted by  Delphinus
					 
				 
				Yes, good luck indeed. I know how it feels, I can only imagine how amplified it would be in a tank of this stature. 
 
I'm sure you've checked, and sorry if I've missed the info, but you've confirmed that you're not getting a NO3 reading? Elevated NO3 can depress your pH somewhat. 
			
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   I got a NO3 reading of 19ppm a few days ago.  My last water change seems to have reduced that to 14ppm.  Phosphates are also slightly high, measuring 12ppm yesterday.  Not perfect...but not the kind of levels that kill coral.  
		
	
		
		
		
		
			
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				400 gal reef.  Established April, 2007.  3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways,  Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
 
My Tank:   http://www.canreef.com/vbulletin/showthread.php?t=28436
			 
		
		
		
		
	
		
		
	
	
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