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Thread: Adding Calcium

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    Adding Calcium


    I'm about to bring my calcium level from 140 to 260. I was told the calcium chloride can be found as a de-icer. I searched for "calcium chloride" at an auto parts store and got my hands on some.

    I've posted a pic of the front and back of the package...can someone in the know confirm that this stuff should go in my pool? I'm concerned about additives etc.

    Also, I understand that I should pre-dissolve in a 5 gallon bucket and only add 10lbs per 24 hours (15K gallon pool). Correct?

    Thank you in advance!

    Attached Images Attached Images

    IG plaster pool; 14,800 gallons; Hayward 48 sqft DE bump filter; 1hp hayward super pump, polaris 9300 cleaning robot

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Adding Calcium

    I do not think that is the right stuff ... the MgCL2 and inhibitors scare me.

    From Pool School Recommended Pool Chemicals
    CH - Calcium Hardness

    Calcium hardness can be raised with calcium chloride or calcium chloride dihydrate. They are available in some areas as Peladow, Dowflake, Tetra Flake, or Tetra 94, often sold as a deicer by hardware stores, and some big box stores, in colder climates. Pool stores will carry either calcium chloride or calcium chloride dihydrate under a variety of names, including Hardness Plus, Balance Pak 300, Calcium Hardness Increaser, etc. Calcium products should be spread across the surface of the deep end of the pool.
    Jason, TFP Moderator
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    Join Date
    Jul 2009
    Olney, MD

    Re: Adding Calcium

    Sorry, but that is not what you want. You really want something that is 100% calcium chloride. It doesn't look like the item you purchased contains any calcium at all. You want something like this:
    20k gal, IG Vinyl, IntelliFlo VF Pump, 60 GPM sand filter, Jandy Aquapure Ei 35, 2 skimmers, one main drain, two returns, Dolphin Diagnostic cleaning robot, Taylor K-2006 test kit

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    Re: Adding Calcium

    You don't want to use that. It's a combination of sodium chloride, magnesium chloride and zinc sulfate. It does not contain calcium.

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    Re: Adding Calcium

    Thank you James, Jason, and anon.

    The inhibitor also scared me, and my gut said there shouldn't be anything other than calcium chloride going in the water.

    Thank you for the amazon link, anon....I just ordered a bag.

    Have a good night gents.


    IG plaster pool; 14,800 gallons; Hayward 48 sqft DE bump filter; 1hp hayward super pump, polaris 9300 cleaning robot

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