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Thread: Super high CYA and CH

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    El Paso, TX
    Posts
    15

    Super high CYA and CH

    We just bought a house with our first pool- 10k gallon, IG, marcite with DE filter. I used my new Taylor K-2006 test kit and got the following results:

    pH: 7.3
    TA:170 ppm
    FC: 2.2 ppm
    CC: 0.4 ppm
    CH: 750 (tested twice to be sure)
    CYA: well over 100. Local pool store test said 195 and the water mixture was just below the 1.8 ml mark in the vial when the dot disappeared.

    I know we need to drain the pool. We are unable to keep the FCl up I assume because of the high stabilizer level. And are battling algae. Our tap hardness is only 100 ppm, so I'm guessing the former owners must have used a ton of powdered sanitizer to get the levels this high. We are using basic bleach for sanitizer.

    I have 2 questions:
    1) do we run any risk of hurting the pool by draining half at once? This still won't get the CYA down enough, but it's a start.
    2) can we use this water on our lawn and shrubs, or will the cyanuric acid hurt the vegetation?

    Any guidance is appreciated.
    Jtowne99 - El Paso
    10,000 gal marcite IG
    Hayward DE 4820 & Star-clear Plus C75
    Install date unk
    TTech K2006 FAS-DPD

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Super high CYA and CH

    1) 50% should be totally fine ... likely need to do that a few times to get the CYA and CH down.
    2) Water should also be safe to use on plants.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  3. Back To Top    #3

    Join Date
    Jun 2015
    Location
    El Paso, TX
    Posts
    15

    Re: Super high CYA and CH

    Great. Thank you. Now we have to figure out how to drain it since the water level is lower than the surroundings!
    Jtowne99 - El Paso
    10,000 gal marcite IG
    Hayward DE 4820 & Star-clear Plus C75
    Install date unk
    TTech K2006 FAS-DPD

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Super high CYA and CH

    Rent a submersible pump ... or buy a smaller cheap one from Harbor Freight as it will be easier to water plants than with the fire hose that comes with the rented ones.

    Although the smaller pump will make the process much slower.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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