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Thread: Filter capacity question

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    Filter capacity question

    We have a cartridge filter on our pool that drives me bonkers. It clan clog up very easily and in just a day or two, overnight as the season goes on unless I blast it out at the car wash (not good I have been told) It seems to take forever with a garden hose to achieve minimal results. Right now, I hate the bloody thing!

    I am considering putting in a SWG and am told the cartrigde filter is actually better with those. Another thing is that with no "back washing," it makes for less chasing of the chemical balance, a plus of the swg system.

    So to come back to my problem, I've read that many older (which this is) cartridge systems are too small.
    What I'm asking is, how does my system compare to my system needs.

    Not knowing what all the different abbreviations mean or which is most critical, I just shot some pics of the data cards on the filter case and pump.
    Here we go...

    [attachment=0:1dxdpvge]P5210015.JPG[/attachment:1dxdpvge]
    Attached Images Attached Images
    East Texas Piney Woods
    (more specifically N/E Texas)
    pool data:
    In ground vinyl lined
    23,500
    sand filter

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Filter capacity question

    There should be another sticker on the filter that tells you if it is a C900, C1200, or C1750. The sticker you have a picture of is the same on all three of those models.
    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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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    Re: Filter capacity question

    Pogo,

    I hear what you're saying but I think it's possible their might be another culprit. Your filter and pump appear adequate for your pool.

    What may well be the issue is where is the junk in your filter coming from. It sounds like algae to me. Are you keeping your pool properly chlorinated? If it's just dirt, that is an excessive amount of dirt and you must have a lot of dusty wind blowing accross your pool. If it's algae, however, the algae will continue to reproduce and die and then clog your filter forever.....regardless of the size of the filter or pum[p.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Re: Filter capacity question

    Quote Originally Posted by JasonLion
    There should be another sticker on the filter that tells you if it is a C900, C1200, or C1750. The sticker you have a picture of is the same on all three of those models.
    Sorry about that! I forgot about that part. Its a C 1200

    Concerning the algae, the filter clogs up even when i'm keeping the water clear and the chemicals balanced.
    East Texas Piney Woods
    (more specifically N/E Texas)
    pool data:
    In ground vinyl lined
    23,500
    sand filter

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    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
    Posts
    9,905

    Re: Filter capacity question

    120 sq-ft filter is a bit small for a 25k gallon pool but you really shouldn't need to clean it more than once per month even for that size so something else might be going on. The cartridge sounds like it might be plugged. You might want to try an overnight dishwasher soap soak, rinse and then followed by an acid/water soak.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

  6. Back To Top    #6

    Re: Filter capacity question

    Quote Originally Posted by mas985
    120 sq-ft filter is a bit small for a 25k gallon pool but you really shouldn't need to clean it more than once per month even for that size so something else might be going on. The cartridge sounds like it might be plugged. You might want to try an overnight dishwasher soap soak, rinse and then followed by an acid/water soak.
    I haven't tried the dishwater soak but i have tried the commercial filter cleaners and they made little difference from the garden hose rinse except for outward appearance. About the longest I've been able to go without significant choking of water flow is about a week. A few days is closer to average.

    Wait a cotton-picking minute!!!

    I just thought of something. In looking at a number of pictures of pools, I noticed the water return was feet below the surface. Our only return draws from the surface. There are plastic baskets but they only filter out larger stuff. I tried putting a screen in the basket to catch smaller stuff but gave it up because it clogged up constantly!!!

    Ok. In light of this, what, pray tell, is our solution???

    Because fewer readers will revisit this thread, I'm posting this new development in a new thread.
    East Texas Piney Woods
    (more specifically N/E Texas)
    pool data:
    In ground vinyl lined
    23,500
    sand filter

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    mas985's Avatar
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    May 2007
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    Pleasanton, CA
    Posts
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    Re: Filter capacity question

    What was it that was clogging up the skimmer? That is probably what is clogging up the filter. Better to clog the skimmer basket so I would leave it in.

    Also, do you have a main drain? That should take over when the skimmer clogs.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

  8. Back To Top    #8

    Re: Filter capacity question

    No m ain or any other drain.

    We do live on an oil tap (stabilized dirt) road frequented by 18 wheeler tank trucks.
    East Texas Piney Woods
    (more specifically N/E Texas)
    pool data:
    In ground vinyl lined
    23,500
    sand filter

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