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  1. #1
    Join Date
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    Default Best Way to Add CYA

    What's the best way to add granular CYA to the pool? I tried the old sock method I read about somewhere on the Forum, but didn't work very well. I'm sure it was user error. I am now trying to dissolve the granules in a bucket of water before putting them in the pool, but they don't want to dissolve. Any advice?

    -Andrew
    Pool Specs: 20,000 gal. • inground • vinyl liner • Hayward s200 sand filter

    21' kidney 20K gal AG pool; Bleach; Hayward S200 sand filter; Hayward pump; 8/10/2012hrs; Taylor k2600; utility water; summer: ; winter: ; iPhone; PF:6

  2. #2
    waterbear's Avatar
    waterbear is offline Lifetime Member Sniggle Mechanic waterbear 4 stars waterbear 4 stars waterbear 4 stars waterbear 4 stars
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    Default Re: Best Way to Add CYA

    Easiest way to add CYA with a sand filter (assuming you are not clearing a green pool at the same time).

    1. Backwash your filter first since you can't backwash for a week
    2. SLOWLY pour the desired amount of CYA granules direcly into the skimmer WITH THE PUMP AND FILTER RUNNING. (The CYA will get caught in the filter where it slowly dissolves).
    3. Run the pump and filter continuously for the next 24-48 hours to help the CYA dissolve faster (Optonal but a good idea.)
    4. DO NOT BACKWASH FOR THE NEXT WEEK.
    5. Test the CYA level in a week (It will probably all dissolve before that but this way you KNOW you won't be adding more than you need if it tests low!)

    To Summerize: Add it to the skimmer with pump running, don't backwash for a week, forget about it for a week, Test it in a week and add more if still too low!
    Retired pool store and commercial pool maintenance guy.

  3. #3
    Join Date
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    Default Re: Best Way to Add CYA

    Thought that might be the trick, but wasn't sure. And, no green water. Luckily my water is crystal clear this year since I had to have the pool drained to fix a leak. Just working to get everything reintroduced and balanced back out. Thanks Waterbear.
    Pool Specs: 20,000 gal. • inground • vinyl liner • Hayward s200 sand filter

    21' kidney 20K gal AG pool; Bleach; Hayward S200 sand filter; Hayward pump; 8/10/2012hrs; Taylor k2600; utility water; summer: ; winter: ; iPhone; PF:6

  4. #4
    fog80 is offline Registered+ Thread Analyst fog80 0
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    Default Re: Best Way to Add CYA

    I'm clearing a green pool and need to add cya. Pantyhose method?

    The water is to the point where I can almost see the bottom, but I haven't turned the filter on yet. I need some time to clean the de "fingers" and prepare to back wash like every hour.

  5. #5
    Watermom's Avatar
    Watermom is offline SuperMod Emeritus Quark Inspector Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars Watermom 4 stars
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    Default Re: Best Way to Add CYA

    I'd clear up the pool and then add CYA if it were my pool. If your pump/filter are not yet running, you're not really going to be able to get it dissolved and into the water.

    Glad to see you back around the forum for another season!

  6. #6
    fog80 is offline Registered+ Thread Analyst fog80 0
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    Default Re: Best Way to Add CYA

    Thanks. Got the filter going now, FC is holding....I'll vacuum up and then add cya
    20,000 gal IG plaster, Hayward Super Pump, EC65 DE filter.

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