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Thread: CYA reading off the charts!

  1. Back To Top    #1

    Join Date
    Apr 2015
    Valley Springs/California

    CYA reading off the charts!

    I finally got tired of dumping tons of money into my pool chems every season. After reading all the "Getting Started" info here and finally learning about pool chemistry. I now know that using the 3" "puck" floater for chlorination, 2 bags of shock every week, and a bottle of algaecide each month, I was destroying my pool chemistry. I now know why every other year I have been instructed to drain (as much as I can) the pool and refill. My CYA level is off the charts (150 by strip, just below the 1.8 mark on my Taylor 2006 kit). I'm trying to learn how to use my new test kit by reading and watching all the videos. I tried to complete the DPD test and stopped after 20 drops of R-0871 failed to "clear" the tube. Rather than waste my time and reagents I'm going to try and lower my pool water and refill so I can get my CYA level down. My question is as follows: by using the pool vac hose and by sealing the other skimmer, I can usually get the water level to drop about 3 feet. Is this going to be enough to lower my CYA level or am I in need of a sump pump? Unfortunately I live in a drought area (California) but I have my own well. It usually takes me several days to fill the pool with a garden hose. Sorry for the long-winded question...but I'm really upset that nobody at the pool store bothered to tell me I should be using liquid chlorine. Other strip readings are as follows: TC-5, FC-5, Ph-7.2, TA-120, CYA-150
    20 year-old in-ground plaster pool. Kidney shaped and (as told by installer, approx. 25,000 gallons). Sta-Rite S8D110 D.E. filter 53 sq. ft. Champion 1 hp pump. Well water. Test Kit K-2006

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

    Re: CYA reading off the charts!

    Welcome to TFP!!!

    If you can drain about 3 feet out of the pool, that is probably well over 50% of the pools volume and will lower the CYA by that same percentage. The issue is you do not know how high the CYA really is to know how much water you need to drain.

    Forget about the test strips.

    Try the diluted CYA test method as described in the Extended Test Instructions.
    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

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: CYA reading off the charts!

    +1 what jblizzle said.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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