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Thread: How much CYA to add?

  1. Back To Top    #1

    Join Date
    Jul 2007
    The Right Coast

    How much CYA to add?

    I know the question is probably on this forum somewhere, but **** if I can find it!

    I'm getting a zero cya reading. I have a 10,000 gal. inground pool. How much CYA should I add?

    Thanks in advance!
    13,000 IG Plaster, 2hp whisperflo pump, 48 sq in pentair DE Filter, 1 skimmer, 2 eyeball outlets, 200 sq ft solar panels on second story, Auto Pilot SWG-36, Polaris ATV Cleaner

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD
    I would start out with 2 1/2 lbs, wait a week and see where you are.

    An appropriate target level for CYA is typically between 30 and 50. It is always best to add CYA in more than one step, so you don't overshoot your target. Increasing CYA is easy, lowering it is difficult. You can use my Pool Calculator, see the link in my signature, to calculate the amount of CYA to add given your pool size, your current level, and your goal level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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