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Thread: How to measur CYA lower than 30?

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    Water_man's Avatar
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    Jun 2008
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    How to measur CYA lower than 30?

    I know there are tests kits that can measure 20 and up, but is there
    anything out there to measure below 20? How reliable is the test?
    This is my ticket for Heaven (when all's working..) :
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    JasonLion's Avatar
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    Re: How to measur CYA lower than 30?

    There are some fairly expensive colorimeters that claim to be able to make accurate measurements of low CYA levels.

    Why would you care?
    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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    Water_man's Avatar
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    Re: How to measur CYA lower than 30?

    Because my CYA is 0 according to one store, 8 according to another, and I want to add CYA to make up for a target of 30. I guess I'll just add up incrementally using the Pool Calc.
    This is my ticket for Heaven (when all's working..) :
    22k Gal gunite IGP, 38 SF Anthony DE filter, 1 HP Hayward Super Pump
    380k BTU Raypak Natural Gas Heater (Model RP405A) and solar cover
    8 gal Liquidator w/ 12% bleach, Dolphin Diagnostic Advantage robotic cleaner. 3800 ppm salt, 50 ppm borates.

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    JasonLion's Avatar
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    Re: How to measur CYA lower than 30?

    Just add 25 and see what it is in a week. If you go a little over or a little under it isn't a big deal.
    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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