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Thread: Hayward sand filter allowing CYA granules into pool

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    Hayward sand filter allowing CYA granules into pool

    I'm a pool newb so maybe this is normal, but I've recently completed a Baquacil to chlorine conversion and I've been adding CYA to the skimmer to bring the level up. I did a sand replacement last night and added some CYA afterward. I noticed there was a decent amount of CYA granules exiting the return jet. If this is normal, how does that happen? Basically, it'd have to bypass the filter lateral fingers, right? If this isn't normal, what could be wrong? I checked all of the fingers in the filter and they were fine, none were broken. I appreciate any advice, thanks in advance!

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    Re: Hayward sand filter allowing CYA granules into pool

    I am pretty sure you are supposed to put the stabilizer in an old sock and place it in front of a return or in the skimmer- you need to "milk" it once or twice a day or the process will take forever. They CYA that you add will not register in testing until approx. one week.
    16 x 32 Sport Pool; Hayward Series Sand Filter S244T
    15,000 Gallons, In Ground with New Vinyl Liner
    Pool approx. Five Years Old. Live in KY

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    Re: Hayward sand filter allowing CYA granules into pool

    Quote Originally Posted by Darren35 View Post
    I am pretty sure you are supposed to put the stabilizer in an old sock and place it in front of a return or in the skimmer- you need to "milk" it once or twice a day or the process will take forever. They CYA that you add will not register in testing until approx. one week.
    Good to know! Like I said, I'm learning

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    Re: Hayward sand filter allowing CYA granules into pool

    Have you purchased a good testing kit- one of those recommended on this site? I bought the T100 and the mixer (love that thing) and it gives very accurate readings. Good luck!
    16 x 32 Sport Pool; Hayward Series Sand Filter S244T
    15,000 Gallons, In Ground with New Vinyl Liner
    Pool approx. Five Years Old. Live in KY

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    Richard320's Avatar
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    Re: Hayward sand filter allowing CYA granules into pool

    There is something wrong there if anything visible to the naked eye is coming out the returns. You don't accidentally have the multiport set to recirc do you? Check for any dribbles out the waste pipe when it isn't on waste or backwash. If you do, your problem is with the multiport valve. If it's okay, then something inside the filter is bad. It could be channeled, which can be fixed by a deep cleaning and breaking up the clods. Or there's a problem with the innards - something not seated fully, something cracked.

    Those granules will settle out and might leave little freckles on the pool surface because CYA is acidic. The instant the filter is fixed, vacuum them up. Meanwhile, brush things around a bit so they don't sit in the same spot all the time.

    And next time, follow the instructions for adding stuff in Recommended Pool Chemicals! If you dismantle the filter or deep clean, any CYA that didn't blow into the pool will be lost. Literally money down the drain.
    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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    Re: Hayward sand filter allowing CYA granules into pool

    Quote Originally Posted by Darren35 View Post
    Have you purchased a good testing kit- one of those recommended on this site? I bought the T100 and the mixer (love that thing) and it gives very accurate readings. Good luck!
    Yes, I got the K-2006 and it's been working great!

    - - - Updated - - -

    Quote Originally Posted by Richard320 View Post
    There is something wrong there if anything visible to the naked eye is coming out the returns. You don't accidentally have the multiport set to recirc do you? Check for any dribbles out the waste pipe when it isn't on waste or backwash. If you do, your problem is with the multiport valve. If it's okay, then something inside the filter is bad. It could be channeled, which can be fixed by a deep cleaning and breaking up the clods. Or there's a problem with the innards - something not seated fully, something cracked.

    Those granules will settle out and might leave little freckles on the pool surface because CYA is acidic. The instant the filter is fixed, vacuum them up. Meanwhile, brush things around a bit so they don't sit in the same spot all the time.

    And next time, follow the instructions for adding stuff in Recommended Pool Chemicals! If you dismantle the filter or deep clean, any CYA that didn't blow into the pool will be lost. Literally money down the drain.
    I checked all of the obvious things, like the valve position and everything was fine. I've ordered a new valve to try out. I followed the instructions on the CYA bottle, but wish they would have mentioned the sock idea that Darren35 posted above. I did that with what I had left of the CYA and it worked perfect. Live and learn!

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