Opening my pool this year I developed calcium stains on the vertical walls of the pool. I was using bleach and cal-hypo tabs to clean up and the stains showed up once I got the water clear. I have lowered the pH to 7.2 and begun to aerate to help remove the staining. Anything else that I could do to help the process? I scraped some of the stains and put them in vinegar and they fiz and dissolve. I have ceased using the calcium hypo and just using bleach after this disaster.
20 by 40 vinyl liner pool with a sand filter 1 hp Hayward pump no other features 35000 gallons
TfP 100 test results