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Thread: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

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    How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    The pool we got used came with some chlorine pucks. I started things up on Saturday. As of last night my CYA was at 50. How much will a puck raise the CYA if I decide to use them up? I thought I saw a reference in another thread to it raising 10 points, but I can't find the thread and don't recall what size the pool was. Should I get a floater or can I just drop a puck in the skimmer basket?
    27' Round Might Sun AG Pool 18000 Gallon Intex Krystal Clear SWG Hayward Pump/Filter on a Timer

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    mikemass's Avatar
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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    No way one puck will raise by 10ppm. Probably more like 0.5ppm. But go to Pool Math. Put your 18000 gallons estimated pool size in there..... Go toward bottom of page "Effects of adding chemicals". Whatever a puck weighs in ozs, enter that. and then choose what a puck is from the drop down (TriChlor? I believe?) I would do it for you, but I have no idea what a puck weighs or if it's even Trichlor. I've never used them.
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    Take some time playing with PoolMath (button at the top). It will answer your question and many more Enter your volume at the top, and then scroll down to "Effects of Adding Chemicals" near the bottom.
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    I didn't think of PoolMath... According to it, the 8oz tablets I have it will raise CYA by 1.8 per tablet. That doesn't seem like much. I'm considering using them in a floater when I go on vacation to augment the SWG.
    27' Round Might Sun AG Pool 18000 Gallon Intex Krystal Clear SWG Hayward Pump/Filter on a Timer

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    mikemass's Avatar
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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    Are you considering this just so they don't go to waste? Or do you feel your SWG needs a little help while you are away? Because you can't bump up the %'age on the SWG or increase the run time if you want to have FC on the high side while you are away.

    That said, I believe it's not a terrible idea to get your CYA higher anyway being that you run a SWG. Your vacation would be a good time to increase CYA via the pucks. Your SWG will work less with a CYA around 70 ish
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    Quote Originally Posted by crokett View Post
    Should I get a floater or can I just drop a puck in the skimmer basket?
    I just realized this wasn't answered. Get a floater. When the puck is dissolving during times of the pump not running picture this: A stagnant puddle of water in the basket with an acidic pH of 4.0 and a FC of 100 (maybe exaggerations, but the idea remains --- Those harsh conditions not too friendly in such a small environment).
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    thanks. It's one less thing for the person who will watching the dog to remember to do. course I might tell them that they can swim if they add bleach every day. I'm pushing the limits of the SWG I have. I'd rather spend money on bleach than come home to a swamp, although the FC seems to be holding steady at around 4 with 0 CC.
    27' Round Might Sun AG Pool 18000 Gallon Intex Krystal Clear SWG Hayward Pump/Filter on a Timer

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    I say stuff half a dozen of those 3" pucks into a duck, turtle of shark floatie. (personally like the shark myself). Keep running SWG on usual schedule... With that you will stay very sanitized while gone...... IF they all dissolve by the time you get back that will have raised your CYA by 10.8. You are at 50 ppm now... If you are operating in a 60-70 CYA level, you will actually have put yourself closer to the ideal range for a SWG and hence you won't be "pushing it's limits going forward.

    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

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    Re: How Much Will A Chlorine Puck Raise the CYA in an 18000 gallon pool?

    I put three 3" in a floater. I was gone 6 days. Came back, the FC was 7, CYA 40, and the pucks were the size of Thin Mints. Worked perfectly.
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