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Thread: How much stabilizer and calcium chloride to add?

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    surfhawaii's Avatar
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    How much stabilizer and calcium chloride to add?

    Filling completely empty pool with new water. Ran tests on tap water going in. Couple questions, I don't want to get into the same mess as I had with high CYA level:

    1. Problem with Taylor K-2006 test kit is that when I test for CYA, the gauge on the low side only goes to 30. At 30 I can still see the dot. If I assume that it is at zero, pool calculator says to add 8 lbs of CYA. But, I don't really know if it's 29, 20, 10 or zero. What is your recommendation on how much to add?

    2. CH is at 50. Pool calculator recommends 48 lbs of calcium chloride to get it to 260. 48 lbs?!...really?

    I've asked this question before but never got an answer. My pool is tiled, which selection do I use on pool calculator, plaster, vinyl or fiberglass. I'm guessing plaster?

    Thanks, Ben.
    24.5k gallon
    Sand filter (Triton II TR 100)
    IG tile
    Pentair VS+SVRS pump
    Sundance Chelsee spa

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    Re: How much stabilizer and calcium chloride to add?

    Hi.
    1) fill water will have no CYA. I get 6# to raise to 30ppm when I input your numbers...
    2) yup. 48#
    3) plaster
    Sorry so abrupt. Dinner is ready!

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    Mod Squad pooldv's Avatar
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    Re: How much stabilizer and calcium chloride to add?

    Yep, she's got you covered here.
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    duraleigh's Avatar
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    Re: How much stabilizer and calcium chloride to add?

    Pretty unusual for your CH to be so low. You are not using a water softener, are you?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    surfhawaii's Avatar
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    Re: How much stabilizer and calcium chloride to add?

    Quote Originally Posted by duraleigh View Post
    Pretty unusual for your CH to be so low. You are not using a water softener, are you?
    No. But one of the pool guys I was talking to said it would be low. Might be typical of Hawaii. But will test again, might be me not testing correctly. Haven't had a problem in the past.
    24.5k gallon
    Sand filter (Triton II TR 100)
    IG tile
    Pentair VS+SVRS pump
    Sundance Chelsee spa

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    Re: How much stabilizer and calcium chloride to add?

    My rule, I usually add a little less of what it says to, since adding more is easy. Overshooting sucks. So add 3 pounds of cya and 30 pounds of ch and retest and see where you are and so on... Till you reach your goal.

    23k gal in-ground gunite w/ spa/blower, Sheer descent, Jandy AquaPure SWCG, Pentair 2HP Pump x2, Raypak P-R406A-EN-C 399k BTU gas heater, Polaris 380/Polaris PB4-60 Pump, DE filter w/ separation tank

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