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Thread: Can I get by with using Trichlor?

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    Can I get by with using Trichlor?

    ~4000 gallon Intex pool: I bought a container of HTH Trichlor pucks before finding this site. Can I make use of them, or do you really think they'll throw the levels off over time? Would it be better to put them in the hanging sock method rather than in the floating dispenser?
    20 X 40 (30,000 gallons) IG vinyl liner with D.E. filter located in southeastern massachusetts

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Can I get by with using Trichlor?

    You can use about 4 lbs of trichlor without any problems. After that it starts to depend on the rate of water replacement. The more splash out and backwashing you do the longer you can keep using trichlor. Eventually the CYA level gets too high, and then there start to be problems.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: Can I get by with using Trichlor?

    Can always use them when you're out of town too.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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    Re: Can I get by with using Trichlor?

    The floater will keep them away from the edge better. Pucks have acid effects from the stabilizer (CYA) and chlorine, both can hurt vinyl.

    You can weigh the pucks and count out the total that equals 4 lbs/ When you are near there, then you will need to test CYA to see where you actually are, after splashout etc, and see if you can use a few more or must switch to bleach or cal-hypo for chlorine.

    I suggest saving a bit of room on the CYA level for using pucks while you are on vacation. So, stop at CYA 30 and know that with a vacation you can use pucks to the point of CYA 50.

    CYA is lost with splashout, and since fill water will have no CYA that will decline. But filling due to evaporation does not change CYA since the CYA was left behind with evaporation. Therefore testing is the best way to know where you are.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

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