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Thread: ADDING CYA

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    gtr1721's Avatar
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    ADDING CYA

    I put CYA in three socks and have them in two skimmers - do I have to keep the filter running overnight tonight or can I just run it all day tomorrow and let the socks stay in the skimmers??????
    IG built in 2007 - Gunite/ Plaster - Lake shape -29,000 Gallons w/ 8' spill over spa (raised)
    SWG - Hayward / Aquarite T-15 cell - Goldline/ Smart Controls (remote)
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    Hayward Viper Auto Cleaner - Fiberoptic laminar patio fountains (3) -Located in New England with full sun

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    duraleigh's Avatar
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    The safest answer is to keep the pump running.

    I personally can't think of a reason why the CYA couldn't reside just fine in the skimmer with the pump off but there may be one I'm not aware of. The pump will certainly help it dissolve faster so that would be my choice...to leave it on.
    Dave S. - Forum owner
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    I let my filter run on it's normal schedule, (2) 6hr cycles, and it takes about 4 days for my sock to empty. Just make sure you don't clean your filter for about a week. CYA is slow to dissolve and some will be in your filter until it completely dissolves.

    oops, was typing at the same time Dave was.
    Nicole

    21' AGP (10,400g)
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    whoozer's Avatar
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    To me it makes more sense to keep it running to get your cya in quicker. The faster its in the quicker your stabilizing. I don't think it will hurt anything but personally I would want my water stabilized more quickly.
    14x33 fiberglass freeform
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    gtr1721's Avatar
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    Thank you! I need to add about 7 #'s so this could take a while - perhaps I am better off just pouring it into the skimmer and let the filter run for a day or two???
    IG built in 2007 - Gunite/ Plaster - Lake shape -29,000 Gallons w/ 8' spill over spa (raised)
    SWG - Hayward / Aquarite T-15 cell - Goldline/ Smart Controls (remote)
    AquaComfort Heat Pump (1500A) -Smart Quad Cartridge Filter
    Hayward Northstar filter pump (2HP) -Hayward Booster Pump (.75HP) -Hayward Super II Pump (1.5HP)
    Hayward Viper Auto Cleaner - Fiberoptic laminar patio fountains (3) -Located in New England with full sun

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    Quote Originally Posted by gtr1721
    Thank you! I need to add about 7 #'s so this could take a while - perhaps I am better off just pouring it into the skimmer and let the filter run for a day or two???
    I wouldn't recommend that approach. If you pour the CYA directly into your skimmer it'll more than likely all settle on top of your filter and the first time you backwash - poof - out it goes. CYA can take up to a week to dissolve. Consider putting the stabilizer in a sock or panty hose, tie the sock off to a nearby stationary object, like a heavy planter, or chair and let it just twist and dangle in front of a return. It will dissolve in time and you won't have wasted your time and money. If you want, you can speed up the process by squeezing the sock every now and then. Hope this helps you out. Good luck!
    20x40 30,000 gal IG Liner, Pentair II Sand

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    I got some HTH brand CYA from Meijer and put it into a sock and threw it in the skimmer. It was really mushy in about an hour, so I hung it in front of my return and in about 2 hours the sock was empty. I only added 2.5 lbs.

    My question is, Why did mine dissolve so fast? ( is it because the HTH brand is made differently) and will there be any in my filter so I should leave it running for a few days ?

    Sorry if I hijacked this thread, I just thought that maybe the info that the HTH brand dissolved pretty fast could help out someone who wanted fast dissolving CYA.

    Thanks
    Brian
    24' round Vinyl liner Doughboy 48" deep 52" sidewall
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    Beats driving to the lake, and I'm only a block away from the lake!!

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    JasonLion's Avatar
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    When CYA vanishes from the sock it hasn't necessarily dissolved. One of the things that happens with CYA is that it first breaks up into tiny grains and then the grains dissolve slowly. If you put a sock in the skimmer, the CYA will break into grains, get through the sock, and go into the filter in a couple of hours. So really that is the same as just pouring it into the skimmer.

    I simply pour CYA into the skimmer and then remember not to backwash/clean the filter for a week. If you know that you will have to backwash/clean the filter then you can try putting the CYA in a sock in front of a return. Some of it will still end up in the filter, but not nearly as much.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Thanks for the fast response Jasonlion, I will hold off on backwashing and will also test later on this weekend to get a true reading on the CYA. I went and looked for this topic elsewhere on the forum and learned a ton from you guys about the CYA and how it dissolves slowly. Of course I did this after I posted my questions. LOL Next time I will do a search first!!

    Thanks again
    Brian
    24' round Vinyl liner Doughboy 48" deep 52" sidewall
    1hp Doughboy pump w/timer
    Doughboy Silica II filter with Zeosand
    Raypak 180,00 btu heater
    BBB method
    Sundance Optima '97 450 gal. spa w/Delzone ozonator
    Beats driving to the lake, and I'm only a block away from the lake!!

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    gtr1721's Avatar
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    I appreciate all of the input - I went to the deep end and read up some more on this and will just add the CYA to my skimmer and run the filter a little longer - final question

    How much CYA do you recommend putting into each skimmer basket? Halfway up or fill it? Then just add more as needed?
    IG built in 2007 - Gunite/ Plaster - Lake shape -29,000 Gallons w/ 8' spill over spa (raised)
    SWG - Hayward / Aquarite T-15 cell - Goldline/ Smart Controls (remote)
    AquaComfort Heat Pump (1500A) -Smart Quad Cartridge Filter
    Hayward Northstar filter pump (2HP) -Hayward Booster Pump (.75HP) -Hayward Super II Pump (1.5HP)
    Hayward Viper Auto Cleaner - Fiberoptic laminar patio fountains (3) -Located in New England with full sun

  11. Back To Top    #11
    JasonLion's Avatar
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    Don't fill the skimmer so full that you block the flow completely, so perhaps 2/3rds full. If you give it ten minutes the level will be down noticeably and you can add more.
    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

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