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Thread: CYA... sigh!

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    JFB's Avatar
    Join Date
    May 2013
    Monréal, Québec, Canada

    CYA... sigh!

    Ok, So I am trying to bring my CYA to 50... I know it should be 70, but I want to bring it up slowly because when the solar cover is on, chlorine goes through the roof!

    I already put in 1.9 kg (68 oz) of stabilizer in my pool 2 months ago but it seems my level is only at 30 (!!) (or slightly below) according to my TF-100 test kit... According to pool calculator, it should be at 38! So I should be measuring/testing 40. Even if I cheat on the up side, I can't get 40. I really see the black dot at 40...

    So, before I put too much of the stuff in there, should I assume it's at 40 and I can't test to save my life or should I assume it's at 30 and adding this stuff is more like art than science?



    13.5k gallons, IG, Vinyl, Hayward C3030 Cartridge, Hayward Tristar 3/4hp single speed, Hayward T-15 SWG, Hayward P4 automation, 234 sqft Solex Solar panels. April 2013 construction, Dolphin DX4 robot, TF-100 test kit, Pentair Deck Jets 2.

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    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: CYA... sigh!

    If you can see the dot, your CYA is lower than the line you are on in the comparator.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: CYA... sigh!

    Assume it is at 30ppm, that is what the test shows ... it could have been lowered due to rain, splash out, backwashing, etc.

    Maybe the intial dose was a bit off or the pool volume is a little different. The CYA test is only good to like +/- 15ppm I think anyway.
    Jason, TFP Moderator
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