In response to my last post concerning hazy water; I haven't solved the problem yet, but a 25% midweek WC seems to have helped some. I don't know what to do about the 5.0 PH. New bottle of reagent arrived today and got the same reading. Checked ammonia and nitrites; both 0.0. Nitrates at 20.6 ppm. Phosphate looks to be between 6&7 ppm. (3.6 dGH, 28 ppm KH, 3-4 bps CO2.) Any suggestions on best way to get this PH up to 6 or so?