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Thread: Newbie with lots of green

  1. Back To Top    #1

    Join Date
    Jun 2016
    Cream Ridge N.J.

    Newbie with lots of green

    test results FC .32
    TC 2.58
    CC 2.56
    ph 7.3
    Ch 166ppm
    TA 69ppm
    CYA 21 ppm

    Have chlorinator for 3 in tabs and 10 gallons of pool chlorine ready to go. Where do I start? adjusting CH and TA first Do I add CYA before shock( slam) Should I start with 5 or ten gallons . Kid at pool shop helpful but not knowledgeable. Have used 15 gallons of chlorine with little effect. Its 80 degrees and water about 68. Hayward sand filter
    20 by 40 inground pool vinyl lined Hayward sand filter chlorine tabs dispenser and pool chlorine approx 35000 gal

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    SW Indiana

    Re: Newbie with lots of green

    Welcome to TFP!

    Don't worry at all about CH or TA. Your pH is okay.

    Assuming your numbers are correct, and that's a big stretch with pool store results, you need to nudge your CYA up a little bit. Using Pool Math you can calculate how much CYA needs to be added to get to about 35ppm for starters.

    Without knowing the volume of your pool, we can't tell you how much chlorine you will need. Pool Math will help you with that calculation as well. Use FC/CYA Chart to get your shock level, the follow the instructions in Defeating Algae to clear the pool. The key point to take away from the article is the hourly testing and dosing of chlorine and the importance of never letting chlorine fall near 0ppm.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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