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Thread: Brand new DE filter

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    Brand new DE filter

    Hi All,

    We got a brand new pool surface (Marquis) and a brand new DE filter yesterday, a big one 60 is the size for my 20,000 gallon in ground pool with chlorine and a pop-up floor system.

    It runs nicely at a pressure of 18 or 20 but then after about 2 hours pressure climbs to 34, water from waterfall slows to a trickle and pop-ups stop working. They told me to backwash it so I did and pressure goes back down, everything works and then in about another two hours, same thing.

    I don't have a lot of confidence that they know what is wrong.....can anyone help?
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    37,879

    Re: Brand new DE filter

    There is a lot of very fine debris in the water, which the filter is catching very quickly and efficiently. After several cycles it will have caught up on the backlog of fine debris in the water and will be able to go longer between backwashings/cleanings.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
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    Re: Brand new DE filter

    If you are back washing then refilling w DE every two hours, you are going to go through a lot of DE. At least I hope you are replacing the DE. You don't want that filter to run with out DE in it.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

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    Re: Brand new DE filter

    Yes I am replacing the DE, (I decided on ecoklean, the less toxic alternative to DE) every two hours as I backwash. Just seems strange, it's a huge filter, a 60 on 20,000 gallons, they never mentioned anything about this constant backwash during startup before they left me Friday afternoon. After 2 hours the pop-up floor system no longer works and the water fall is a trickle until I backwash again??? Wierd.
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

  5. Back To Top    #5

    Join Date
    Jul 2011
    Location
    south central texas
    Posts
    3

    Re: Brand new DE filter

    I am having the same problem, but without having gotten a new filter. This pool has normally had a 10 month to one year turnaround on cleaning the grids, and I just did that about 6 weeks ago. My prior pool went a couple of years without cleaning the grids with no problem. Both are Hayward 60 sf DE filters. Now I do a backwash, and less than 24 hours later I am 15 psi over my baseline (36 over 21).
    18K gal IG pool
    gunite
    1.5 hp pump
    60 sf DE filter

  6. Back To Top    #6

    Re: Brand new DE filter

    Burnedout are you using Real DE or Ecoklean. Have you been using the same stuff on both filters?
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

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    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: Brand new DE filter

    The fibre DE replacements have a tendency to clog quickly. This is due in part because they filter finer - but personally I think they just are not as robust as DE in a pool filter. Theoretically there will come a point when your water is clean enough that you are not backwashing every 24 hours.

    If you've just had the plaster redone you might want to use regular DE until it needs a backwash and then give the fibre a second shot.

    I redid my plaster last fall and tried the fibre only to find it.... disappointing. I only backwash my DE twice a year so....I went back.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  8. Back To Top    #8

    Join Date
    Jul 2011
    Location
    south central texas
    Posts
    3

    Re: Brand new DE filter

    I use the real DE in both pools.
    18K gal IG pool
    gunite
    1.5 hp pump
    60 sf DE filter

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    Re: Brand new DE filter

    I keep seeing people talk about DE being toxic... everything I have read says it is non toxic and great for bug repellent and ant killers. When I backwash it goes right out into my yard. Am I missing something?
    Cleveland, Ohio
    IG 36,000 gallons. Vinyl Liner, Hayward ProGrid 3620 DE Filter, Hayward Super Pump, Hayward Gas Heater

  10. Back To Top    #10

    Join Date
    Aug 2010
    Location
    Dallas, TX
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    4,052

    Re: Brand new DE filter

    Outdoor DE is not the same thing as the DE used in swimming pool filters. Pool grade DE is Diatomaceous Earth produced for pool filters and it is treated with heat, causing the formerly amorphous silicon dioxide to assume crystalline form. Pool grade DE should never be used for pest control. Swimming pool DE ranges from 60% to 70% free silica, and can be a carcinogen (lung cancer) or a cause of silicosis.
    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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  11. Back To Top    #11

    Re: Brand new DE filter

    Burnedout, were you having this problem after using the DE Substitute?
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

  12. Back To Top    #12

    Re: Brand new DE filter

    I had the same problem with the DE alternative and am running fine with the regular DE.
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

  13. Back To Top    #13

    Re: Brand new DE filter

    Possible that switching seems to relieve the problem, when in reality switching (after using DE for several cycles) occurs after most of the fine particles are removed, and the DE alternative seems to work when the DE actually did the work.
    18000 gallon in- ground fiberglass pool.
    Hayward DE filter, solar heat in sunny San Jose, CA.
    Automatic pool cover.

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