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Thread: Is this a correct D.E. calculation?

  1. Back To Top    #1

    Join Date
    Jul 2012

    Is this a correct D.E. calculation?

    "Filter square footage divided by 5 equals number of scoops or pound coffee cans of D.E. to skimmer"
    Got this online...
    So my really old big D.E. filter says 72 SQ. FT.

    72 / 5 = 14.4
    I only put 5 pounds after I hosed down grids(yuk!)

    Should I add more? 14.4 pounds seems like a lot...

    if it matters- whisper flow, 30k/spa
    25k I/G ecostar ccplus Polaris plaster

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Is this a correct D.E. calculation?

    You got a make and model on that filter?

    I just looked at two different DE filters and an 80 ft² takes 8 lbs of DE and a 72 ft² takes 11 lbs, so I don't think your rule of thumb is very accurate. However since a 1 lb coffee can holds about 1/2 lb of DE I'd say you're in the ballpark. I might add another couple of lbs since you broke it apart and cleaned it.
    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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