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					Originally Posted by  newreefer_59
					 
				 
				ph 8.7 
Calcium 420 
Kh was 10 
 
that was my thought re: the RODI, but wondering why it is not 'cleansing' the water now.  I replaced the DI last July and the RO membrane in July 2011. 
			
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 Do you have it on an auto shut off of some sort or do you manually shut off the source water by turning a valve ?