Have needed to add about 2 cups / day muriatic acid to approach pH goal of 7.5. Fill water is pH 8.0, and using a peristaltic pump dispensing 24oz/day 10% bleach. The 2C acid is about 8 times what Pool Math says, so makes me wonder what I'm doing wrong. My pH measurement tool is an Apera PH700 meter, calibrated with pH 7.0 standard before each measurement. When researching bleach, supposedly only 4% excess NaOH at this concentration, so I don't think that is the culprit. Waterfall 8" high does not add much agitation, but runs 8 hours / day. FC is 2ppm before daily addition. CH is 200, TA 110, CYA 30.