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Thread: problems adding DE to sand filter

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    problems adding DE to sand filter

    hello! im in the process of clearing my pool. im about 6 inches away from seeing the bottom!!!! ive been adding DE to my filter to clear the pool faster. only problem is i cant add not a teaspoon more than 1/4 cup. if its just 1/4 cup the pool filters just fine if i add a little more the filter clogs right up. maybe this isnt a problem (lol) but after reading the "how to" i figured the sand filter should be able to handle more DE than that. stats are in my signature! also i replaced my sand last year and this sand is much finer. i wonder if that might be the cause.
    24' X 52" round above ground pool---13,500 gallons---Hayward power flow matrix 1.5 hp pump---Hayward 21 in. variflow XL sandfilter---Louisville, Ky

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    JasonLion's Avatar
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    May 2007
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    Re: problems adding DE to sand filter

    This is a common problem with new DE filters as well. The improved filtering from adding DE causes the system to catch a lot of very fine debris that has been in the water for a long time and passes right through the sand. If you go through a couple of cycles of adding just a little more DE, waiting till the filter pressure goes up, and then backwashing, the filter will catch the extra fine debris and after a couple, maybe several, cycles of that the water will be cleaner and the filter will go longer even with the extra DE in it. This process is extra work, but it does clear up the water more quickly.
    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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    Re: problems adding DE to sand filter

    I have plenty of time! so if i read your message correctly each time i do a new "cycle" with the DE i add a little more and eventually it would have cleared most of the fine particles so the DE wont get clogged as fast thus the filter wont get clogged as fast!
    24' X 52" round above ground pool---13,500 gallons---Hayward power flow matrix 1.5 hp pump---Hayward 21 in. variflow XL sandfilter---Louisville, Ky

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: problems adding DE to sand filter

    Yes, except that you probably won't ever need more than 3/4 or 1 cup of DE.
    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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