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Thread: CYA off the Charts! Dump and refill.. Adjust CYA first?

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    CYA off the Charts! Dump and refill.. Adjust CYA first?

    ~14,500 gallon pool that sees morning sun to early afternoon ~4pm or so.

    Pool was self maintained by previous owner and then last year by a "professional" crew. This year I am in control -

    First test CYA was off the chart. I dumped just about 13k gallons or so. Fresh water added and here are the results.

    FC = 1.8
    CC = 1.2
    PH = 8 or greater
    TA = 225
    CH = 250
    CYA = 30 (or just about)

    Am I ok with CYA @30 and moving right into lowing PH?
    Pflugerville (Austin) Texas - 14,000 in ground plaster/pebble using cartridge (CV460) filtration system. Currently testing with a Taylor K-2006c test kit - Using Liquid Chlorine - No SPA or SWG. Pool was build in 2013

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    AimeeH's Avatar
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    Re: CYA off the Charts! Dump and refill.. Adjust CYA first?

    Welcome.

    Yes CYA is good at 30.

    How are you testing your water?

    Your PH and TA are very high.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    CYA off the Charts! Dump and refill.. Adjust CYA first?

    Have a k-2006c test kit -

    I thought the PH was high too. Tested twice and it was above 8 both times.

    Same for TA -

    Recommendations on lowing PH
    Liquid Acid (muriatic acid) or Dry Acid -Clorox PH Down (or other brands)
    Pflugerville (Austin) Texas - 14,000 in ground plaster/pebble using cartridge (CV460) filtration system. Currently testing with a Taylor K-2006c test kit - Using Liquid Chlorine - No SPA or SWG. Pool was build in 2013

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    Mod Squad mknauss's Avatar
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    Re: CYA off the Charts! Dump and refill.. Adjust CYA first?

    Muriatic Acid. Be sure to check that it is 31.45% concentration. Home Depot or Lowes is where I get it. Some have pool stores that sell it at a good price. I pay $12.98 for two gallons at HD. Watch out for the fumes, they can be a bit powerful. Pour slowly into your return flow. Leave pump on for 30 minutes or so to be sure it is mixed.

    You will probably want your CYA closer to 50 being in Texas. Will slow down chlorine loss to the sun. You will be adding chloring daily.

    Take care!
    6000 Gallon IG Fiberglass with integrated Spa;Pentair CCP240 Cartridge Filter with Pentair Intelliflo VS Pump and HTR250 heater. IC40 SWG. EasyTouch 4. Dolphin Active20 Robot "Roadrunner", TF 100 Test Kit w/SpeedStir!
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    Marty

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    Re: CYA off the Charts! Dump and refill.. Adjust CYA first?

    Quote Originally Posted by mknauss View Post
    Muriatic Acid. Be sure to check that it is 31.45% concentration. Home Depot or Lowes is where I get it. Some have pool stores that sell it at a good price. I pay $12.98 for two gallons at HD. Watch out for the fumes, they can be a bit powerful. Pour slowly into your return flow. Leave pump on for 30 minutes or so to be sure it is mixed.

    You will probably want your CYA closer to 50 being in Texas. Will slow down chlorine loss to the sun. You will be adding chloring daily.

    Take care!
    Thanks for the feedback! And thanks for the great forum! Members seem to be the best out there unlike so many other forums.

    Headed to HD first thing in the morning. As for chlorine I have a significant area that is shaded all day! I have a pump on order and have a connection for bulk bleach (55 gallon drum) 12.5% for just over $2 a gallon.
    Pflugerville (Austin) Texas - 14,000 in ground plaster/pebble using cartridge (CV460) filtration system. Currently testing with a Taylor K-2006c test kit - Using Liquid Chlorine - No SPA or SWG. Pool was build in 2013

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