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Thread: Pool will not clear with Zeolite

  1. Back To Top    #1

    Join Date
    Apr 2016
    Leesburg, GA

    Question Pool will not clear with Zeolite


    I have a gunite inground pool, 20 x 40, with a Hayward filter, 2HP pump.
    When I purchased the house, the pool was neglected, so I cleaned it out and replaced the filter media with Zeolite. That year the water was decent.
    Last year and even more so this year, the water is filthy, green/brownish, constantly depositing a layer of sludge on the bottom. There are no trees nearby, so no leaves.
    I opened the filter, and the Zeolite had tunneled.
    I broke it up, and flushed the Zeolite with a garden hose for about 4 hours. The water coming out of the top was still filthy and full of debris. After another 4 hours, the water became somewhat clear, and free of debris. I stopped the water, and drained the filter. Shortly after that, I felt the Zeolite, and there was a slimy 1/4" thick layer of gunk across the top of the Zeolite. I scraped it off, and flushed the filter again with the hose for another 4 hours. The Zeolite is still not clean.
    I'm about the take it all out and replace it with sand.
    It shouldn't be this hard to keep the pool water clear.
    South GA, pool water by now is 94`F.
    Any advice greatly appreciated.
    Thank you.


  2. Back To Top    #2

    Join Date
    Apr 2013
    Sacramento, CA

    Re: Pool will not clear with Zeolite

    Most on here would recommend replacing with sand. But before you do that.

    I would read this thread on deep cleaning the filter.

    Deep Cleaning a Sand Filter

    I would follow all the steps and then see how its working.

    I would also read this thread:

    Sand vs. Zeolite comparison - anyone tried both?

    and the latest word Read the last post from JoyfulNoise he is the resident chemist:

    Sand v zeolite
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Heliocol solar panels, Polaris 360 supply side cleaner, waterfall

  3. Back To Top    #3

    TFP Guide

    Join Date
    Jul 2015
    Central Valley CA

    Re: Pool will not clear with Zeolite

    Welcome to the forum.

    How are you maintaining water chemistry? Green water is a sign of algae and that can't be helping matters with the filter. You are going to need to deep clean as Gwegan sugested but if you don't get the water sanitized you will just end up on a treadmill of sorts.
    12,300 Gallon, IG PebbleFina, built Oct 2015, 3 ft sheer, 2 Jandy nicheless LED lights, Jandy Pro 1.5HP VS pump (A.O. Smith Motor), PB4-60 Booster pump, Polaris 280, Jandy cv340 cartridge filter, Zodiac z4 control panel W/iAquaLink, 10GPDStenner for chlorine, 3GPD Stenner for MA, TF-100.

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