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Thread: I have to decide which size cartridge filter

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    I have to decide which size cartridge filter

    Hi the dig started yesterday on a 69000l ig pool. The ps is selling me a hayward filter rated up to 80000l. I have the option of purchasing the next size filter ie.80000l plus. It will cost more initially plus the cartridges cost more. My question is will the larger filter save me time and money in the long run? Will the cartridges last longer?
    My pool area has several large trees in the area and several filthy children. Can I extend the life of the cartridges by installing a pool skim?
    Thanks guys,

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    Re: I have to decide which size cartridge filter

    Its hard to determine if you will save time and money in the long run with a larger filter. In theory you should gain time between cartridge cleans with the larger filtering area of the larger cartridges. You could save money by the pump not working as hard as the filters start to get dirty. I have read that it is better to have too much filter. We have the largest Pentair cleanclear plus filter for our 16000 gallon pool.
    16K gallon, Pebble tec, beach entry. Two 1 hp Pentair Whisperflos. One for Paramount MDX2 main drain, Paramount debris canister, and Pentair CCP 520 filter. One for skimmer w/sock and Paramount PCC2000 in floor cleaner. 3/4 hp Pentair Pinnacle for waterfall. Fiberstars fiber optic pool lighting. Aqua-Logic AQL-P-4 control panel with wired remote in the house. SWCG system that is not used. Ultra-Pure Ozonator that is not used.

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    orthofish's Avatar
    Join Date
    Jan 2009
    Northern Middle Tn.

    Re: I have to decide which size cartridge filter

    I went one step larger on my filter than was required for my pool and have not regretted it. I only clean mine 2x a year.

    16x38 FG, 20,400G, 1HP/2sp Tristar pump, Hayward 425sq ft cart. filter, Pro Logic4, SWCG, 3 returns, 2 main drains, 1 skimmer, 4 Pentair deck jets, Hayward Phantom pressure cleaner/booster pump, TF-100 of course :-)orthofish-s-pool-build-finally-t13179.html

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: I have to decide which size cartridge filter

    I strongly recommend getting a filter that is larger than what you really need. A larger filter will filter better and go longer between cleanings/backwashing. However, a larger filter won't necessarily last any longer than a smaller filter. Reducing the frequency of cleaning the cartridges does reduce the stress on the cartridges slightly, but if you are cleaning them properly that shouldn't make much of a difference.
    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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    Join Date
    Sep 2008
    The Woodlands, Texas, USA

    Re: I have to decide which size cartridge filter

    I agree. For cartridge filters the larger the better.
    I have a 500 sq ft filter and I clean it twice a year.
    IG 24k plaster with overflow spa. Goldline PS-8 SWG. Tristar 0.75 HP filter pump, Polaris 280, large cartridge filter, 400k BTU NG Max-E-Therm HD, SR Smith Turbo Twister, Life Saver pool fence, ORP managed.

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