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Thread: can the filter be too big?

  1. Back To Top    #1

    Join Date
    Mar 2010
    Dallas, TX

    can the filter be too big?

    I have the opportunity of buying a Pentair FNS 60 SQ FT DE filter for a real good price. My question, is that too big of a filter for my pool? Not really sure how many gallons it is but its a free form 18x36, 3ft shallow, 8ft deep end. I keep getting different numbers, from 15,000 to 22,000 gallon pool. I have a 1.5 HP pump right now, with a SF of 1.3.

    I was originally going to buy a new 36 SQ FT and then after asking on a thread, was informed that a 48 SQ FT filter would be better. I now found this deal on the 60 SQ FT, but is that overkill?

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: can the filter be too big?

    It's almost impossible to get a filter too big as long as you have room for it. Almost everything works better as a result.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: can the filter be too big?

    I guess there is a limit but within practical limits you can't have a filter too big. That 60SF filter wil be great for your pool. Go for it and don't look back!

    Oh yeah, and I agree with Dave. tpying at the same time.
    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

  4. Back To Top    #4

    Join Date
    Mar 2009

    Re: can the filter be too big?

    I had to clean my 200sf cartridge filter ONCE at the end of the season. That was nice. I did take it apart in the middle of the season too, but it wasn't really dirty. But now I know that it may only need it once per year.

    Fyi, I'm in the NE where the season isn't too long.
    18' x 54" Round AG 7500 gallon w/small prefab 2-piece fandeck
    Waterways 200sf Cartridge Filter, 1.5 hp 2-speed pump. 2" pvc piping
    Pool Pilot Total Control swg w/acid tank feeder
    Pool Rover Jr., BBB, TF 100 test kit

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