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Thread: Cal-Hypo Tablet use in Rainbow 300?

  1. Back To Top    #1

    Join Date
    Apr 2010
    Houston, TX

    Cal-Hypo Tablet use in Rainbow 300?

    i have a Pentair Rainbow 300 feeder designed for 3" Trichlor tablets and would like to use it for 3" Cal-Hypo Tablets. Has anyone done this or see any problems? I don't want to add chlorine every night or go back to using Tri-Chlor.

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  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Cal-Hypo Tablet use in Rainbow 300?

    That really won't work at all. Cal-hypo dissolves very quickly compared to trichlor. Anything designed to work with trichlor is going to feed in way too much water and the cal-hypo will all end up in the pool in short order. Also, you never want to put cal-hypo into a chlorinator that has held trichlor in the past.

    There are a few chlorinators designed to work with cal-hypo, but they are difficult to find and don't seem to be reliable long term.
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