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Thread: CYA absorption rates - and time between adjustments

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    gatorbrit's Avatar
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    CYA absorption rates - and time between adjustments

    I need to bring my CYA up a bit (it was at 30 and I was burning through Chlorine) before you ask - I did SLAM, and passed all three tests - OCLT was <1ppm.

    Anyhow, I added some a day ago, and went to re-test and noticed a small improvement. I was in the process of adding more and I put it in a bucket and added water first. Surprise surprise it just sat there.

    This was a major epiphany for me. CYA takes several days to dissolve and therefore, you shouldn't keep adding more to get to your target without letting a day or three pass between dosing.

    Am I correct in my thought process? (The last thing I want to do is over dose my pool on CYA. Last time I did that I had to drain part of it!)
    18k vinyl IGP, Sand Filter, EasyTouch Control Sys, Pentair Intelliflo, Intellichlor IC 40 SWG, Rheem Heat Pump.

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    Mod Squad jblizzle's Avatar
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    Re: CYA absorption rates - and time between adjustments

    We recommend hanging the CYA in a sock in front of the return jet so you know when it is all dissolved. You should also wait around a week after it is dissolved before you re-test.
    Jason, TFP Moderator
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    gatorbrit's Avatar
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    Re: CYA absorption rates - and time between adjustments

    That's good to know, I will sit tight then.
    18k vinyl IGP, Sand Filter, EasyTouch Control Sys, Pentair Intelliflo, Intellichlor IC 40 SWG, Rheem Heat Pump.

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    BayScoutTim's Avatar
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    Re: CYA absorption rates - and time between adjustments

    It helps to squeeze the sock every now and then. Walk out with a flashlight at night, turn your pump off and squeeze the sock in still water. You will see the cloud This will give you a visual of what is going on. 5 - 8 day's max.
    BayScoutTim
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    Isaac-1's Avatar
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    Re: CYA absorption rates - and time between adjustments

    My understanding of things, if I have read Chemgeek's posts correctly is that even once the CYA is dissolved, you still have to wait a few days for it to show on the test as it still must chemically convert in the water to the form the test shows.
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    gatorbrit's Avatar
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    Re: CYA absorption rates - and time between adjustments

    Quote Originally Posted by Isaac-1
    My understanding of things, if I have read Chemgeek's posts correctly is that even once the CYA is dissolved, you still have to wait a few days for it to show on the test as it still must chemically convert in the water to the form the test shows.

    I think this is crucial - it would be easy to keep making adjustments thinking that the adjustments are not working.
    18k vinyl IGP, Sand Filter, EasyTouch Control Sys, Pentair Intelliflo, Intellichlor IC 40 SWG, Rheem Heat Pump.

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    Mod Squad jblizzle's Avatar
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    Re: CYA absorption rates - and time between adjustments

    That is why I said wait a week AFTER it is dissolved. Might not need to wait that long though.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: CYA absorption rates - and time between adjustments

    OK, I read back through the post. It looks like I said it would take 5-8 day's max to test your water. What I "meant" was 5-8day's for it to dissolve. My bad.

    Actually I started this on the 18th, 10 day's ago. It dissolved in about 3-days. My CYA is still CREAPING up . . . . Around 36 now.

    Didn't mean to create any confusion just offering my 2-cents as it might help someone.
    BayScoutTim
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    :: 28' round Doughboy AG (18,400 gallons) :: Hayward 1-1/2 hp Power-Flo Matrix pump :: Hayward Pro Series 21" top mount high-rate sand filter 65GPM :: Hayward Vari-Flo XL 7-way valve :: AquaBot Breeze 4WD :: TF-100 XL test kit :: SpeedStir magnetic stirrer ::

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