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Thread: New to the pool please

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    Join Date
    Jul 2016
    Winchester, Kentucky

    New to the pool please

    We just purchased a home with an inground pool that had not been opened in 3 years. After a couple of weeks of hard work we have the water tests adjusted and the water is crystal clear! The pool was full of black algae when we started. Everything that I have read says that I should change the sand in my filter at this point. All of the model numbers and such are not visible anymore. How do I know how much sand to put in my filter?

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    TFP Guide
    Jimrahbe's Avatar
    Join Date
    Jul 2014
    Bedford, TX

    Re: New to the pool please

    Hi Jess, welcome to TFP,

    I do not have a sand filter, but everything I have read on this site says that the sand does not "go bad" or get "used up". When you backwash does the waste water look clear after a few minutes? If so, I see no obvious reason to change it.

    Why do you want to change the sand? Also, if you'll send us a pic, I'm sure someone here will be able to identify your filter.

    You should get additional input, as people that are more familiar sand filters, read your question.


    Jim R.
    Finished in 2015 - 17K Gal, IG, 20' x 25' Almost Rectangular Pool, Pebble finish, three rockport water falls. Pentair Equipment: EasyTouch 4, IC40 SWG, 3 HP VS Pump, CCP5200 Cartridge Filter.
    TF100 with SpeedStir and SampleSizer, ColorQ Pro 7, Dolphin Premier Robot Cleaner, added Screen Logic 2.

  3. Back To Top    #3
    Pool Tool's Avatar
    Join Date
    May 2014
    Western Chicago Area, IL

    Re: New to the pool please

    Welcome. Congratulations, great story. Sounds like you made that happen in a very short time, awesome. How did you test the water? I would personally stop reading those articles, sand really never needs to be changed. Whatever you did to clear the water of algae cleared the filter as well. It took it from black to clear in several weeks - I would say it is working fine! Black and mustard algae get a lot of attention but are treated the same as regular algae with measured, elevated and consistent chlorine levels.

    If you really want to change the sand, most filters call for 10-12" of "freeboard" or open space at the top of filter. If you can post a pic and measure the height and diameter of the filter most likely somebody will be able to tell you what it is.

    Update - I took to long to post and basically copied Jim verbatim.
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

  4. Back To Top    #4
    cj3737's Avatar
    Join Date
    Jun 2016
    North Ogden, UT

    Re: New to the pool please

    You really don't need to change the sand but if you want to, its your choice...
    A good benefit of changing it is you get to look inside and see how it works... You can see if your laterals are good (major problem if your filter starts throwing things back into your pool) and youll basically be starting new and not worrying about whats stuck wayyyyyy down in there....
    Inherited 24' Muskin Above ground
    13500 gal
    Hayward S180T92S Sand filter
    Taylor K-2006C Speedstir
    TFPC for Beginners | Pool Math | Pool School | CYA Chart | SLAM | Test Kits | ABC's

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