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Thread: Cartridge Filter or Sand Filter

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    Cartridge Filter or Sand Filter

    I currently run a cartridge filter and have been told that I should switch to a sand filter. Comments or recommendations?
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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    Mod Squad Bama Rambler's Avatar
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    Re: Cartridge Filter or Sand Filter

    Why do they think you need to switch? What problems are you having?
    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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    JasonLion's Avatar
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    Re: Cartridge Filter or Sand Filter

    Welcome to TFP!

    What kind of filter you use is almost entirely a personal preference issue. There are some differences between the various filter types but they are fairly minor. For example a cartridge filter makes the most efficient use of water, since rinsing the cartridge off takes much less water than backwashing a sand or DE filter. DE filters filter down to a smaller particle size than other filters, sand is the "worst" and cartridge filters are in-between. However, most people can't detect any difference caused by that.

    The main differences are in the approach to cleaning the filter. Cartridges get removed and rinsed off, sand gets backwashed, and DE gets backwashed usually and occasionally needs to be opened up and throughly cleaned.

    The size of the filter make a dramatically larger difference than what kind of filter you have. Larger filters can go longer between cleanings and are slightly more efficient.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Cartridge Filter or Sand Filter

    The problems that I am having with the cartridge filter is that I am having to buy a new one every year at a cost of $150 -$200. My pool installer said that I should not have to replace them but ever 5 years or so. Also I have to clean it on a weekly basis after they told me I should not have to do it but once a month. Also I have to run my pump on level 3 or 4 out of 4 just to have the correct flow.
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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    Mod Squad Bama Rambler's Avatar
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    Re: Cartridge Filter or Sand Filter

    Sounds like more of a size issue than a design issue. If it's too small then switching to a sand filter may not be a bad idea. However if it's really a water quality issue that's causing you to have to clean it and replace it regularly then switching won't solve anything.

    What size is it?
    Are you having any water issues?
    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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    Re: Cartridge Filter or Sand Filter

    No water issues. When you say size I assume you are talking the size of the pool? If so the pool is a 14x28 fiberglass pool.
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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    Mod Squad Bama Rambler's Avatar
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    Re: Cartridge Filter or Sand Filter

    I should have been more clear. I meant the size of the filter. However my next question would have been pool size.
    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

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge Filter or Sand Filter

    You have 2 thread now going that are related ... thus making everyone confused:
    pool-filter-issues-t62764.html

    Quote Originally Posted by Smartspool
    No water issues. When you say size I assume you are talking the size of the pool? If so the pool is a 14x28 fiberglass pool.
    We disagree as you have now stated you have algae in the other thread.
    You issue with the current filter seems to be chemistry related.
    Jason, TFP Moderator
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    Re: Cartridge Filter or Sand Filter

    I am not sure of the size but the type is a PLM100.
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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    Mod Squad jblizzle's Avatar
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    Re: Cartridge Filter or Sand Filter

    You pool is likely around 11k gallons (depends on the depth). You filter is a 100sqft cartridge.

    We would recommend a minimum of:
    163 sqft cartridge
    2.1 sqft (19.4" diameter) sand

    So you current filter is certainly on the small side which is contributing to your constant cleaning ... compounded by the apparent existence of algae.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    ComputerGuyInNOLA's Avatar
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    Re: Cartridge Filter or Sand Filter

    Your filter must be undersized. I have had to clean mine once after 8 months of use. Either that or you have a very large amount of debris and/or an algae problem. If the large amount of debris is a problem, sand would probably be a better choice.
    Gunite/Plaster pool at 13k gallons. All Jandy with CL340 series cartridge filter, 1.5 HP Jandy Stealth pump. Jandy 1400 SWCG and PDA4 controller. Dual waterfalls. Polaris 280. Pool installed August 2012. Southern Louisiana. And lets not forget my trusty TF100 test kit!

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