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Thread: Muriatic acid

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    Muriatic acid

    I have a 33,000 gallon black PebbleTec in ground pool, suffering from years of chronic scale or calcium build up on entire pool surface. Usually in spring I drain and manually acid wash (very labor intensive). Pool supply store clerk suggested placing 10 -15 gal of muriatic acid in it for winter and let acid do its work over time. Pump will be disconnected for winter. Does this make sense?

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: Muriatic acid

    If you are looking for an excuse to replaster it does. Do not do it.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    UN1017's Avatar
    Join Date
    May 2012
    Sacramento, CA

    Re: Muriatic acid

    Welcome to TFP.

    You have an example of a pool that is definitely not trouble free. Has the pool store given you guidance on how to avoid this condition? Probably not. I am not anti pool store. I buy my MA there but I do my own testing and don't let them sell me any potions. Do you have a good test kit? Do you have an idea what you calcium hardness level is?

    Let's gather as much info as possible and we can get you some solutions.
    15'x30' IG - Roman-style - 14K - Pebble Fina Classico
    Filter: Jandy CL460 Pump: Jandy Stealth SHPF1.5 SWG: Jandy AquaPure 1400 Cleaner: Jandy RayVac Test Kit: TF-100 w/SpeedStir

    Chlorine/CYA Chart----Extended Test Kit Directions----SLAM

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    Melt In The Sun's Avatar
    Join Date
    Oct 2009
    Tucson, AZ

    Re: Muriatic acid

    ...and, where are you located? does the pool stay open all year?
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
    Make each day your masterpiece. - John Wooden

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