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Thread: de with sand filter

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    de with sand filter

    do I added my de about a hour ago and the starting psi was 14 now its at 18 anything I need to do?
    please help thanks

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    Richard320's Avatar
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    Re: de with sand filter

    Quote Originally Posted by lisa9126
    do I added my de about a hour ago and the starting psi was 14 now its at 18 anything I need to do?
    please help thanks
    Sounds like backwash and then add some more DE to me. That's more than a 25% increase in pressure.

    According to the article in Pool School, you can expect a rapid rise in pressure because it's really clearing out the superfine stuff the sand missed.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: de with sand filter

    ok so its supposed to be high I did backwash it a little last night but this morning it is so nice and sparkling clear

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    duraleigh's Avatar
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    Re: de with sand filter

    Lisa,

    Why did you add the DE if your pool was sparkling clear?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: de with sand filter

    The pool was not clean it was cloudy with a little green

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    Re: de with sand filter

    I am new to all this pool stuff..

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    linen's Avatar
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    Re: de with sand filter

    Green and cloudy means you need to do the shocking process.

    Also read the article: http://www.troublefreepool.com/pool-...efeating_algae
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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