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Thread: When to change SAND in sand filter?

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    When to change SAND in sand filter?

    I just started really getting into looking after my mom-n-law's pool and thanks to TFP members/Pool School/PoolCalc and new test kit, it looks great (just gotta stop testing the water sooo much tho). I have a question regarding the sand filter. When do I need to replace the sand in the filter. The name brand is Hayward and the label states it holds 300lbs of sand. Just to be curious today I took the small top of the sand filter and looked in and noticed the sand level was noticably below half full. Is this a problem? Can I just add to or is it better to replace with specified amount. I do not know when the sand has been replaced but I do know that it has not been in the last 5-6yrs. Also what is the best place to get replacement sand if advised I need too. Thanks in advance. Carl

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: When to change SAND in sand filter?

    We almost never recommend replacing the sand, but since you don't know how much is gone or how much you need to add, its probably a good idea just to buy the recommended amount and remove what's in there and refill fresh.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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