Originally Posted by Snaredrum
Your RO/DI should be at neutral (7.0) if its not, something is wrong. Maybe filter need changing. I just bought RO/DI from my LFS after he just changed filters and bingo.....7.0 PH
the surprising thing is the filters, membrane and di resin are only 3 1/2 months old
Mike, how are the fish in hypo doin?...hope all is well