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Muriatic Acid & Swimming Pool Care

muriatic acid,salt water swimming pools,swimming pool chemistry,swimming pool care,swimming pool care instructions

Swimming Pool Care Instructions



Liquid muriatic acid, or hydrochloric acid is very strong and corrosive inorganic acid used to lower pH and alkalinity levels for weekly above ground and inground pool maintenance.

It is one one of the most corrosive forms of acid and its use goes from swimming pool care to metal and brick cleaning.

If you happen to spill some on your clothes, fabrics, varnished furniture, plastics, or most any painted surface, you can say bye-bye to them because it will eat through these things before you're able to wash it off.

Types Of Pool Acid

There are mainly two kinds of pool acid:

  • Liquid (muriatic acid)

  • Dry Acid (Sodium Disulphate) This kind of pool acid is easier to store and handle but also must be used with care.

    Uses For Muriatic Acid

    The two main uses for hydrochloric acid is to lower your pool pH and total pool alkalinity levels. The process on how to do that is found in the above links and also in the charts below.

    Safety First

  • Always add your muriatic acid to water, never water to acid

  • Always wear heavy-duty gloves, goggles, and long sleeve shirt

  • Keep out of reach of children and pets

  • Store away from other chemicals and never store liquid over dry pool chemicals

    • Please remember that muriatic acid is one of the most powerful and corrosive forms of acid so take the proper precautions.

    Muriatic Acid Charts For Swimming Pool Care

    Chart - Lowering Total Alkalinity

    DecreaseGALLONS IN POOL
    (ppm) 1,000 5,000 10,00015,000 20,000 25,000 50,000
    102.56 oz. 0.8 pts. 0.8 qts. 1.2 qts. 1.6 qts. 2.0 qts.1 gal.
    20 5.12 oz. 1.60 pts. 1.6 qts.2.4 qts. 3.2 qts. 1.0 gal. 2 gal.
    307.68 oz. 1.2 qts. 2.4 qts. 3.6 qts. 1.2 gal. 1.5 gal.3 gal.
    40 10.24 oz. 1.6 qts. 3.2 qts.1.2 gal. 1.6 gal. 2.0 gal. 4 gal.
    5012.80 oz. 2.0 qts. 1.0 gal. 1.5 gal. 2.0 gal. 2.5 gal.5 gal.
    60 15.36 oz. 2.4 qts. 1.2 gal.1.8 gal. 2.4 gal. 3.0 gal. 6 gal.
    701.12 pts. 2.8 qts. 1.4 gal. 2.1 gal. 2.8 gal. 3.5 gal.7 gal.
    80 1.28 pts. 3.2 qts. 1.6 gal.2.4 gal. 3.2 gal. 4.0 gal. 8 gal.
    901.44 pts. 3.6 qts. 1.8 gal. 2.7 gal. 3.6 gal. 4.5 gal.9 gal.
    100 1.60 pts. 1.0 gal. 2.0 gal.3.0 gal. 4.0 gal. 5.0 gal. 10 gal.


    Chart- Lowering pH

    IncreaseGALLONS IN POOL
    pH 1,000 5,000 10,000 15,00020,000 25,000 50,000
    7.6-7.8 1 1/2 oz.6 oz. 12 oz. 18 oz. 24 oz. 1 qt. 2 qts.
    7.8-8.0 1 1/2 oz. 8 oz. 16 oz. 24 oz.1 qt. 1 1/4 qts. 2 1/2 qts.
    8.0-8.4 2 1/2 oz.12 oz. 24 oz. 1 1/4 qts. 1 1/2 qts. 2 qts. 1 gal.
    Over 8.4 3 oz. 16 oz. 1 qt. 1 1/4 qts.2 qts. 2 1/2 qts. 1 1/4 gal.



    Once again, be aware that muriatic acid is dangerous so take the proper precautions when making any adjustments to your pool and handle it with care.

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