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Thread: How do you know when to change the sand?

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    How do you know when to change the sand?

    Is there some tell tale sign or warning one should look out for? Is there a time period rule of thumb? Thanks.
    16 X 32 Vinyl. Hayward aqua rite salt system, T -15 cell. Hayward H250 gas heater, Hayward 1HP superpump.

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    Join Date
    Jul 2010

    Re: How do you know when to change the sand?

    There's usually no need to change the sand in a sand filter. There are a few instances where the sand needs to be replaced but they are not a result from the sand wearing out or just getting old. The sand is already millions of years old when you buy it.

    Converting a pool that had been using Baquacil to Chlorine needs the sand replaced after the conversion. Sand that is heavily calcified might need to be replaced because it clumps together and creates channels that allow dirt to pass through. The majority of problems that people attribute to the filter are actually problems with the water.
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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

    Re: How do you know when to change the sand?

    +1 what yeggim just said.

    I have also found it a good maintenance practice to take the top off the sand filter yearly and clean or at least inspect the sand bed.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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