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Thread: PH - H2SO4 / HCl?

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    PH - H2SO4 / HCl?

    I've never thought about the difference in PH reducers.
    During a year and a half I used PH reducer that contains HCl.
    But half a year ago I bought PH reducer (H2SO4), not thinking about the difference in it.
    a month or two ago I've noticed white stains on the surface, tried to clean, but no results.
    Can PH- (H2SO4) cause it? What do you think? Maybe someone had the same... How to get rid of it?
    Thanks for any help.
    15k diving pool. Originally built in 1979. Rebuilt, except shell in 2008. mini pebble, faux rock slide with jumping rock, 2 1hp whisperflo pumps, tr140 sand filter. Flagstone coping. raised wall with stack stone.

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    Join Date
    Jan 2009
    Cupertino, CA

    Re: PH - H2SO4 / HCl?

    White stains might be calcium scale. Please post a full set of test results (pH, TA, CH, CYA, salt if you use a SWG) and we can see whether that indicates a problem.
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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