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|   Interesting, I don't like my PH to fall below 8.0.  usually runs 8.2 in the day.  I do use a  Aquavitro product called Balance occasionally when I see day readings below 8.0.  This product is unique as it converts bicarbonate into carbonate.  So it isn't just a PH buffer, which I don't use.  Maybe see how it works for you? 
				__________________ Red Sea REEFER 450 |