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Thread: raising cya

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    raising cya

    Hello,

    How many pucks would i need to help raise cya while the stabalizer i put in pool is slowly disolving? and for how long? Right now my reading for cya is 0 so with the ny heat right now im going through bleach like crazy.
    Oh, I have a 10000 gallon above ground pool.

    Thanks
    TF-100 Test Kit, 28,000 gallon IG , 3M quartz plaster '09, 48 sq ft DE filter, Heat Siphon SX5HP heat pump '09, Polaris 360 '10, Protect-A-Child safety fence

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    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,085
    The answer depends on the actual puck weight. The 3" pucks come in slightly different sizes of 8, 7 and 6 ounces. If you are using 8-ounce Trichlor pucks, then one of these in 10,000 gallons adds 5.5 ppm FC and 3.3 ppm CYA. In general, for every 1 ppm FC you get with Trichlor (regardless of puck size) you get 0.6 ppm CYA as well.

    The Trichlor pucks do not dissolve very quickly. In a floating dispenser, they take many days. Even putting a puck in the skimmer (which should only be done if the pump is ALWAYS running), it still takes at least a day or two to dissolve.

    The fastest way to add CYA is to either use Dichlor granules/powder which dissolve quickly and add 0.9 ppm CYA with every 1 ppm FC or to use Instant Pool Water Conditioner found here. The Dichlor will add chlorine as well as CYA while the latter Instant...Conditioner product is just a different form of CYA (that is less acidic as well).

    Richard
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  3. Back To Top    #3
    thanks.

    i guess i wont add anything right now since i already added the stabalizer and i need to wait for it to disolve and retest. I have a large tree with debree overhead. when i vacuum how should i? pump to waste? or filter to waste? If i do filter to waste wouldnt i have to backwash and i dont want to do that while the stabalizer is disolving right? thanks in advance

    tara
    TF-100 Test Kit, 28,000 gallon IG , 3M quartz plaster '09, 48 sq ft DE filter, Heat Siphon SX5HP heat pump '09, Polaris 360 '10, Protect-A-Child safety fence

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887
    If you have a multi-way valve with a waste setting then vacuuming to waste is fine. If you have a push pull valve then you don't want to vacuum while there is CYA in the filter.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5
    i have the multi valve setting, but which one do i do, pump to waste or filter to waste?
    TF-100 Test Kit, 28,000 gallon IG , 3M quartz plaster '09, 48 sq ft DE filter, Heat Siphon SX5HP heat pump '09, Polaris 360 '10, Protect-A-Child safety fence

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