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Thread: High CYA

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    Waggy's Avatar
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    Mar 2016
    Location
    Cyprus
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    19

    High CYA

    I got my new tester today (pool exact Z), i can source the recommended kits here in Cyprus but would struggle to get the reagents imported, so went for the photometer route.

    So, i did my tests and double checked these by getting my water retested at a pool store. More or less the same, give or take a little bit.

    pH 7.4
    TA 138
    TC 0
    CC 0
    CH 228
    CYA 320!!
    Pool temp is 80 degrees and air temp is 85 degrees but that will rise to above 100 in the coming weeks.

    Pool is clear and blue, i am now in the process of draining 80% of my water to get the CYA down to more acceptable levels,

    The biggest problem i have here is getting a decent strength bleach, the highest concentration i can get is less than 5%.

    I suffered last year with algae and now i know why!

    What will be the best way to sanitise my pool? do i stick with 90% trichlor pucks or go another route, calhypo and trichlor or stick with the weak as pee bleach?

    Cheers, Mike
    26ft x 13 ft 11000 US gallon inground vinyl lined pool, Triton TR60 sand filter, Pentair 1hp pump, poolexactZ photometer tester, From May to October 90 degrees and above pool in sun all day

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    18,768

    Re: High CYA

    The best way is bleach or installing a saltwater generator. You've seen how CYA builds up with dichlor and trichlor. It'll be much the same with Cal-hypo leaving behind Calcium. Salt should be easy to find, even in Cyprus.

    I'm not sure what kind of dairy industry exists in Cyprus, but they use high-strength Sodium Hypochlorite to sanitize dairy equipment. Check at an ag supply for it, if such places exist.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Waggy's Avatar
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    Mar 2016
    Location
    Cyprus
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    19

    Re: High CYA

    Thanks for the prompt reply, you've got me thinking now, a friend at works wife works for the government dairy industry, perhaps she'll know.

    Last time i had algae i just hammered it with the bleach and it cleared, now i know a little bit more of your ethics i can use TFP to get my perfect pool.
    26ft x 13 ft 11000 US gallon inground vinyl lined pool, Triton TR60 sand filter, Pentair 1hp pump, poolexactZ photometer tester, From May to October 90 degrees and above pool in sun all day

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