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Thread: Chlorine tabs w/o CYA

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    Default Chlorine tabs w/o CYA

    Can they be had? I like the convenience of the dispenser, but don't want to get the CYA levels too high.
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    Last edited by PoolDoc; 09-03-2014 at 07:02 PM. Reason: fix title

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    Default Re: Chlorene tabs w/o CYA

    Sure. There are Cal-Hypo based tablets, that add calcium rather than CYA. Unfortunately they tend to dissolve rather quickly and turn to mush, unless you get the type in a plastic capsule. And you MUST NOT put them in the same feeder as Tri-chlor tabs (the ones that add CYA).

    But they are, IMHO, a really lousy alternative to Tri-Chlor tabs.
    Carl

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    Default Re: Chlorene tabs w/o CYA

    As Carl noted, cal hypo tabs don't perform as well as trichlor tabs, in a feeder. I've never tried them in a floater, so I can't say how they work.

    There are some VERY expensive feeders designed for commercial installations, but they aren't very practical for residential use.

    But . . . if you are looking for a 'easy' method, running a pool the way the chlorine gas 'shooters' in Arizona, California and Texas do: adjust the CYA to 100 - 150 ppm and dose weekly with 10 - 15 ppm of chlorine. They used to use various algaecides, but you if you maintain very low phosphates (PO4 < 0.1 ppm) you can accomplish the same thing. (You don't want to have to use chlorine as an anti-algae treatment when CYA > 100 ppm, since that requires FC levels as a high as 50 ppm).

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    Default Re: Chlorene tabs w/o CYA

    I put the Cal-hypo tabs in my skimmer once and in 2 hours they were mush and the skimmer was jammed up....Not a fan!
    Carl

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    Default Re: Chlorine tabs w/o CYA

    I don't think that's typical of all CH tabs. However, you could work around that in several different ways, such as putting them in a perforated plastic bottle that's resting in the skimmer.

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    Default Re: Chlorine tabs w/o CYA

    Interesting idea, but I haven't had to mess with it in years.
    Carl

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    Default Re: Chlorine tabs w/o CYA

    How does the commercial feeder work?

    I have a chlorinator sys in the well house that uses a holding tank I fill with a bleach/water mixture and a chem pump (piggy backing my well pump) that pumps it in. Wondering if I could find some 100% sodium hypochlorite somewhere and use a similar pump to meter it in. I have a RS6 controller with a spare relay I could program to do pretty much whatever.

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    Default Re: Chlorine tabs w/o CYA

    Outta my league here. Just bumping thread cause I see you're checking for responses.
    26K gal 20x40 rectangular IG vinyl pool; Apr 2014: New pump, liner, auto-cover, & water; Pentair Whisperflo 1HP pump; Pentair Trition sand filter; Cover/Star CS-500 auto cover; Taylor K-2006C; OTO

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    Default Re: Chlorine tabs w/o CYA

    Bleach is sodium hypochlorite mixed with brine, which is saltwater. Strongest I know of is nominal 12.5%, which, when fresh cam test as high as 14%.
    Carl

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    Default Re: Chlorine tabs w/o CYA

    I did a bit more reading and discovered 100% sodium hypochlorite is a solid, unstable and very hard to find. Guess that's out.
    Wish I could find an alternative to buying gallons and gallons of bleach every week. Seems like there would be a market for CYA-free tabs if they were available.
    IG concrete 30k gal FNS60 DE filter 2hp single speed Haywood pump

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