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Thread: pH is

  1. Back To Top    #1

    Join Date
    May 2008
    gulf coast of Texas

    pH is

    Here are my numbers from this evening:

    FC 6.5
    CC 0
    TC 6.5
    pH 8.2
    TA 140
    CH 300
    CYA 30

    No algae signs. There is scaling...mostly like cracked egg shells when I scrape it off. Not on the liner..but its on the inside of the filter compartment and where the intake and return are. I'm thinking its the powdery residue in the pool most likely from the stabilizer two weeks ago. I've cleaned all the scaly stuff though. Still a lot of residue on bottom of pool though. Will a sand filter do a lot better job of filter all the fine powdery residue than those cheap paper cartridges I buy for the crappy pump/filter??

    What can I do to lower the pH? Powder does not seem to dissolve in this I hate to go adding anything powdery or granular since I'm dealing with residue already.

    Atlantic Pool Products "Prestige" metal wall pool 18' x 48" round
    vinyl liner
    Hayward Power Flo pump
    Hayward Perflex DE Filter Model EC50AC

  2. Back To Top    #2

    Join Date
    Jan 2009
    Cupertino, CA

    Re: pH is

    The scaling is because your pH, TA, and CH are all high.

    Muriatic acid (from hardware store paint dept) is liquid so you won't have problems dissolving it. But it is POTENT stuff, pour slowly in front of a return jet with the pump on. Many of us use rubber gloves when handling the stuff. It can give off unpleasant fumes, you'll be happier if you can arrange to be upwind of the measuring cup. You probably want to get a plastic measuring cup that you use only for pool chemicals.

    You'll need about 4 cups of it to lower your pH down to 7.5.

    You also might want to read about Lowering TA so this is less likely to happen again.
    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

  3. Back To Top    #3

    Join Date
    Feb 2008
    Denton, TX

    Re: pH is

    You'll find that most of us here tend to use the muriatic acid to lower pH when it creeps up. It is easy to measure and dose, distributes well into the water, and doesn't add any extra stuff that we don't like into the water. The pH minus powders can add certain substances sometimes that can cause problems when they accumulate in the water. Overall, just as long as you respect the warning labels on the bottle of muriatic acid and are careful with it, you'll be fine.

  4. Back To Top    #4

    In the Industry

    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: pH is

    Yes, if you feel you are ready to upgrade to a small sand filter next season, it will do a much better filtration job than the Intex. Be sure to get an appropriate size though, you don't want to go too big on the pump, or too small on the filter.

    If you predissolve powder chemicals before adding them, you shouldn't have any residue. CYA is best added thru the sock method.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

  5. Back To Top    #5
    reebok's Avatar
    Join Date
    Apr 2009
    Lakeland, FL

    Re: pH is

    you can also find muriatic acid at the pool store. it's cheaper there than the hardware store around me.
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

  6. Back To Top    #6

    Re: pH is

    I'll second that Muratic Acid is potent stuff. We used it to 'bleach' the wood decks on the Cutter I was stationed on in the Coast Guard back in the '70's. I can't remember how many pairs of jeans I ruined by having that stuff (even diluted) splash up on me.
    on the Northcoast of the U.S.A.

    24ft AG-13,500 gal-Hayward S-166T high rate sand filter-pump is SplashPak Hp 1spl (whatever that means)-TF100 test kit

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