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Thread: Sand filter and DE in pool

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    Sand filter and DE in pool

    I have a Hayward sand filter, 5 years old, deep cleaned and new gasket and multiport at the beginning of this summer. I SLAMed the pool about a month ago and added some DE per pool school to polish the water off. Man did it look good. It only took a few hours and I backwashed the DE out. At that time I did notice a very small amount of DE on the pool floor. Like 1/8 cup maybe. Fast forward a couple of weeks and I add DE again. I suppose because of the previous bout this time the pressure went up the initial pound and that was about it. The DE has been in there about a week and pressure still hasn't gone up 20-25%. Water looks great but everyday there is a little more DE on the pool floor. Hard to say how much but it's quite a bit. Maybe a cup? So that brings me to my questions:

    1) I want to vacuum it up today. Will a skimmer sock catch DE? If not I wonder if the sand would catch it so I could backwash it out. I hate to vacuum my CYA to waste and this will take a while to vacuum.

    2) Is this normal? I used chlorox DE from Lowes and that stuff was fine like flour. I guess it's so fine it can work it's way through the sand eventually?
    18' x 36' saltwater inground vinyl pool

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    In the Industry
    duraleigh's Avatar
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    Apr 2007
    Sebring, Florida

    Re: Sand filter and DE in pool

    I'll bet it goes through the skimmer sock but I don't know that.

    I think if you vacuum it into the filter it will stay there (or most of it, anyway)
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Sand filter and DE in pool

    Gracias senor. I've never used a skimmer sock so I may try it just for fun. Will post my results.
    18' x 36' saltwater inground vinyl pool

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