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Thread: Sand and Cartridge filter

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    Sand and Cartridge filter

    I have an odd question that I would welcome your thoughts on. I have for the last couple of years contemplated on adding a cartridge filter down stream of my sand filter. It should work. The sand will get 95% of the trash and the cartridge will catch 99% of what the sand misses. Assuming flow rate of the cartridge is sufficient for the the pump I see no problems in doing this. Its advantage over cartridge is that I could backwash instead of disassembling the cartridge and cleaning it. I am guessing that cleaning the cartridge at the end of the season would be sufficient due to the sand catching most of the debris pre-cartridge?
    Anyone tried it? Any thoughts on it?

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    Mod Squad Bama Rambler's Avatar
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    Re: Sand and Cartridge filter

    I've thought about it but it adds head to the system and I don't think the payback would ever work out. Have you tried adding a little DE to your sand filter?
    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
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    Re: Sand and Cartridge filter

    Quote Originally Posted by Bama Rambler
    I've thought about it but it adds head to the system and I don't think the payback would ever work out. Have you tried adding a little DE to your sand filter?
    I add ZEO Fiber D.E. substitute to my sand through the skimmer.

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    Re: Sand and Cartridge filter

    My pool is crystal clear with just a sand filter.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: Sand and Cartridge filter

    Quote Originally Posted by RobbieH
    My pool is crystal clear with just a sand filter.
    Mine is crystal clear as well. When you get in the bottom with scuba gear on and lay there and look up you can see that the sand filter is not truly getting everything.

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    Mod Squad Bama Rambler's Avatar
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    Re: Sand and Cartridge filter

    Chances are that a cartridge isn't going to get it either. You may want to consider either a small micron cartridge filter ($$$$) or a DE filter.
    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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    Re: Sand and Cartridge filter

    I am considering D.E. in the distant future.

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    linen's Avatar
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    Re: Sand and Cartridge filter

    Quote Originally Posted by reynolds357
    When you get in the bottom with scuba gear on and lay there and look up you can see that the sand filter is not truly getting everything.
    Stop doing that (it is likely you are the only one that is seeing anything)
    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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    Re: Sand and Cartridge filter

    That is the best way in the world to clean the pool. You can find all kinds of stuff the robots miss.

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    Patrick_B's Avatar
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    Re: Sand and Cartridge filter

    Quote Originally Posted by reynolds357
    Quote Originally Posted by RobbieH
    My pool is crystal clear with just a sand filter.
    Mine is crystal clear as well. When you get in the bottom with scuba gear on and lay there and look up you can see that the sand filter is not truly getting everything.

    Yes, stop doing that!
    TFP Moderator
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    Re: Sand and Cartridge filter

    When you get in the bottom with scuba gear on and lay there and look up you can see that the sand filter is not truly getting everything.
    Try that at night with the lights out....that should do the trick. (I'm kidding)
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Sand and Cartridge filter

    At night with the lights out? That would mean I would have to break out my HID light I use for cave diving.

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    Patrick_B's Avatar
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    Re: Sand and Cartridge filter

    Quote Originally Posted by reynolds357
    At night with the lights out? That would mean I would have to break out my HID light I use for cave diving.

    Take that, and shine it into one of your returns at night, then you will see the true horror.
    TFP Moderator
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    Re: Sand and Cartridge filter

    I will have to try that.

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    Patrick_B's Avatar
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    Re: Sand and Cartridge filter

    It will drive you crazy. I tried the slime bag here for extremely fine dust and it really has been impressive. They do work. I think the 1 micron claim is a stretch however.
    TFP Moderator
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