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Thread: chemical levels

  1. Back To Top    #1

    Join Date
    May 2014
    Mokena, IL

    chemical levels

    added 25 oz of muriatic acid last night as my ph was at 8.2

    readings this morning

    just added about a half gallon of bleach

    would appreciate any thoughts on what else I need to do

    I also have several spots/stains on the bottom pool liner. Not sure how old the pool liner is as we bought the house last August with the pool. Tried scrubbing them with a brush didn't do much if anything. My next thought was to use my 1500 psi power washer on them??

    AG vinyl 27' dia pool 17,100 gallons - cartridge filter 2hp pump - Hayward gas heater model H-2001(200,000BTU) - TF-100 Test Kit - Trees around - Mokena,IL

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: chemical levels

    FC is too low. With CYA at 50 you want FC between 4 and 8 and never below 4.

    Your TA is also too high, which could lead to calcium scaling. Take a look at the Pool School article on lowering TA in the How To section.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: chemical levels

    Since you added bleach, I'd say go swimming. Tell the kids to splash a lot. That will drive pH up, and then you can lower it to 7.2 with acid, which will also lower TA. Win-win!

    Organic stains will fade over time if you maintain FC levels. Did you have a layer of rotting leaves on the bottom when you opened? That will do it.

    Or you can see if they are metal stains from someone adding copper algaecides or using some proprietary super-duper mineral sanitizer. Set a plain uncoated Vitamin C tablet on it for a couple minutes and then remove it. If there is a clear circle where it was, it's metals. There's a lengthy article regarding metal stains in pool school if that's the case
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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