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Thread: Fine suspended particles - how to eliminate

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    Join Date
    May 2011
    Coral Springs, FL (near Ft. Lauderdale)

    Fine suspended particles - how to eliminate

    During the day, the pool looks crystal clear. At night, in the light I can see fine particles in suspension. Any suggestions on how to eliminate them? I was thinking of Leslie's Ultra Bright clarifier, but I'm not sure if it is what I need. I have a cartridge filter and have recently replaced the cartridge which had no effect on the particles. Thanks!

    Latest numbers are below:

    FC: 6
    CC: 0
    pH: 7.6
    TA: 80
    CH: 300
    CYA: 50
    Borates: 50
    15x30 inground concrete pool w/spa and spillover, all under screen enclosure
    Hayward C1200 StarClear Plus Cartridge Filter and Hayward Navigator V-Flex
    Jandy AquaPure 1400, Laars LX400 propane heater w/120 gal above-ground tank
    Jandy VS FloPro 2.7 HP Pump VSFHP270JEP; FlowVis FV-C Flow Meter
    Jandy iAquaLink and OneTouch controller w/PDA remotes; JVA for draining pool

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    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Fine suspended particles - how to eliminate

    Very difficult to do. Over the years it seems to me that simply increasing the pump/filter run time gives me more water clarity. A cartridge filter does a pretty good job so I would suggest just running it more.

    Of course, having adequate chlorine in the water is the most important factor to having a clear pool.

    I doubt a clarifier would have any significant affect.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Mint Hill, NC

    Re: Fine suspended particles - how to eliminate

    I remember reading that cartridge filters like sand filters get more fine particles out when they are a bit dirty. There was a term used that I cannot recall for this type of filtering. The point of this is that you have to give it some time to build up some grime to be more effective. Too much grime reduces flow, but too little reduces filtration.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  4. Back To Top    #4

    Join Date
    Jul 2011
    Mesa Arizona

    Re: Fine suspended particles - how to eliminate

    I had this problem with fine particles. It's much more apparent when you have the pool light on at night and it really bothered me so I started doing some research and asking the nice folks on this site. You need to somehow make your filters work better. In other words, to filter much smaller particles.
    In my case, I have a sand filter. Sand filters only filter particles down to about 40 microns or more. Your cartridge filter does filter particles much finer than my sand filter but the same thing applies. You need to figure out a way to make it filter much smaller particles.
    What I did was to add a cup or so of DE to my sand filter. DE will filter particles down to something like 5 microns. Let me say that the difference was amazing and it happened literally over one night.
    I don't know if you can add just a little DE to a cartridge filter so I'll let the experts here chime in on that but if that is an option for you, I can recommend it highly.
    Be prepared to clean you filters more often though. I had to backwash my sand filter many times until it got out all the fine particles.
    Good luck to you.
    Mesa Arizona. Old school 26,000 gallon in ground plaster pool with sand filter built in 1984.

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