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Thread: Pool Filter Issues

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    Pool Filter Issues

    Good afternoon...I have a Sta-Rite System 2 Filtration System (Model # PLM100) for my pool. I was told by our installers that my cartridge should last me around 5 or so years. I am on year 3 of my pool and I am on my 3rd filter. I have to clean it on a weekly basis as well as soak it on a monthly basis. In order for the flow to be right I have to at least keep the pump running on 3 out of 4. Any help or advise on what might be causing this would be great.
    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: Pool Filter Issues

    Could be a chemistry issue. The cartridges could be developing calcium scaling that would require a TSP soak and then an acid soak (is this what you are doing? ... re-how-to-clean-a-cartridge-filter-t4465.html) Or there could just be low level algae that is constantly clogging the filter.

    Please post a full set of test results.
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    Re: Pool Filter Issues

    I have soaked it in the StripKleen solution sold at my pool store. Over the last 4 days or so I have rinsed it daily and I am getting a greenish film coming off of the filter. This is a first for that. I have not tried the cleaning with muratic acid. I will try that next. Where can you buy that at?
    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: Pool Filter Issues

    If you see green, then you do not have adequate chlorine in your pool because algae is clogging up the filter. This points to a need to go through the Shocking Your Pool PROCESS

    You can get muriatic acid at just about any pool or hardware store.
    Jason, TFP Moderator
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    Re: Pool Filter Issues

    If you are getting green, you probably have live algae which would answer why your filter are constantly clogged.

    No filter can filter live algae. I'll bet you have inadequate chlorine in the pool and that is indirectly causing the filter issue. Can you post test results?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Pool Filter Issues

    I will check the results this evening once I get home from work. I completely agree with your algae conclusion but why would I just now start to see the green coming off of the filter. That just started this week and I have had the pool for 3 years?
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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    Re: Pool Filter Issues

    but why would I just now start to see the green coming off of the filter.
    It could be one of a thousand things. Far more important is to manage your pool water a bit more carefully. If that is algae in your pool (and it sounds like it), you are a classic case for reading up in Pool School about precise, timely testing and adequate chlorine additions. Your pool can be absolutely sparkling and your cartridges will stay clean for an unbelievably long time.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Pool Filter Issues

    My pool has a salt system so would that make any difference in the above recommendations?
    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: Pool Filter Issues

    Well that means that your pH is more likely to be too high if you are not testing regularly and thus contributing to possible scaling in the cartridge.

    It is all speculation without good test results [FC, CC, pH, TA, CH, CYA].
    Jason, TFP Moderator
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    Re: Pool Filter Issues

    FC=5, pH=7.8, CYA=70, TA=131, Total Hardness=122. What is CC?
    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: Pool Filter Issues

    If you do not know, you have not read Pool School

    It is combined chlorine and makes clear that you do not have the FAS-DPD chlorine test.

    For a CYA of 70ppm, your FC should never be less than 5ppm and since you need to go through the shock process, the shock FC level is 28ppm: pool-school/chlorine_cya_chart_shock .... Does your kit go that high
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Pool Filter Issues

    I have a kit coming Saturday. I normally have been taking a sample to the local pool shop weekly.
    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: Pool Filter Issues

    Well the kit will help get the water straightened away, but you should probably still follow the instructions on cleaning the cartridge before you start the shock process.
    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
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  14. Back To Top    #14

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    Re: Pool Filter Issues

    Will do. Thanks for the help!
    Jonathan Smart
    17,000 Gallon, In Ground, Gunite, Sand Filter, VSP, Installed 4/2016,

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