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Thread: CYA

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    Join Date
    Apr 2013
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    Phoenix,AZ
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    CYA

    Been using the TFP method for approximately 2 years now and its been great, with many compliments from friends.....so thanks for all the previous help.

    Quick question regarding CYA levels. Is it normal to lose 20ppm of CYA from the previous season? Reason I ask is I havnt added any CYA since last season (April of 2015) when I had it at 50 ppm.
    Tested the CYA today and it was down to 30 ppm and have noticed in the last week its been starting to burn through about 2-3ppm of Chlorine a day (using 10% chlorine). So I am going to add some stablizer to get it back to 50ppm using the sock method as I did last year. This I am sure will help save on the chlorine usage. By the way the water looks great.

    Thanks as always......this is the best site on the web for pools
    Phoenix, AZ USA 12k gal, IG pebble, Pentair TR-100 sand filter, Jandy/Zodiac ePump series-variable speed, builit 1991 (re-plastered with pebble 2013-new pump 2011), Taylor 2006 test kit with (FAS-DPD) chlorine test w/speedstir, Spa attached

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    Donldson's Avatar
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    Re: CYA

    It is very normal to lose 2-5 ppm of cya a month, so it sounds like you are right in that normal range.

    From my HTC One via Tapatalk
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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    Join Date
    Apr 2013
    Location
    Phoenix,AZ
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    36

    Re: CYA

    Thanks for the response......that is what I assumed with rain and back wash and other things over the course of a season........
    Phoenix, AZ USA 12k gal, IG pebble, Pentair TR-100 sand filter, Jandy/Zodiac ePump series-variable speed, builit 1991 (re-plastered with pebble 2013-new pump 2011), Taylor 2006 test kit with (FAS-DPD) chlorine test w/speedstir, Spa attached

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    Donldson's Avatar
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    Location
    NW Ohio
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    Re: CYA

    Yep, lost with water replacement plus chlorine does break it down verrrrrry sloooowly. It is good to check it every couple of months to make sure things are still in line. Sounds like your pool will warn you if you forget though

    From my HTC One via Tapatalk
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

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