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Thread: Recent sediment at the bottom of pool

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    Join Date
    Oct 2007
    Location
    Jacksonville, FL
    Posts
    22

    Recent sediment at the bottom of pool

    For the past three days sediment been collecting at the bottom of my pool. I vacuum to filter but the next evening it re-appears.
    Test results:
    PH 7.4
    CL 3.0
    CH 450
    CYA 50
    ALK 60
    Salt 3900
    Borate 50

    Here are a few pics

    I'm not sure if this is relevent but I recently added a box of Borax and a quart of sequestrant.
    Does anyone know why this sediment has suddenly been appearing?
    Thanks
    Attached Images Attached Images
    21K - marcite - inground - Autopilot 48 SWG - 240 sq ft Pentair filter - 2hp 2sp Pentair pump - solar heater

  2. Back To Top    #2
    Mod Squad woodyp's Avatar
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    Apr 2010
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    East Texas
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    9,002

    Re: Recent sediment at the bottom of pool

    Probably just not being caught by the filter. Sneak some pantyhose over your skimmer basket and see if it helps.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    dmanb2b's Avatar
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    Apr 2009
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    NY
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    Re: Recent sediment at the bottom of pool

    Looks like pollen or dust to me
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    frustratedpoolmom's Avatar
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    May 2007
    Location
    SWSuburban Chicago, IL
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    Re: Recent sediment at the bottom of pool

    Me too.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    duraleigh's Avatar
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    Apr 2007
    Location
    Sebring, Florida
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    30,084

    Re: Recent sediment at the bottom of pool

    With that screen over your pool, I suspect the "sediment" is not coming from outside your pool but from within........i.e. algae.

    Absolutely the quickest and cheapest identifier is to carefully retrieve some from the pool floor and "roll" it between your thumb and forefinger. Is it gritty like dirt or slimy like algae?

    Let's try that test first and then figure it our from your post back.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    frustratedpoolmom's Avatar
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    May 2007
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    SWSuburban Chicago, IL
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    11,965

    Re: Recent sediment at the bottom of pool

    If it is perhaps algae, and Overnight FC Loss Test would rule out organics too...
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  7. Back To Top    #7

    Join Date
    Oct 2014
    Location
    Bloomingdale
    Posts
    19

    Re: Recent sediment at the bottom of pool

    Very good advice on all parts. having same exact re-occurring issue with sediment every season. Have put nylons over skimmer basket on top of skimmer sock. Didn't think to put nylons over return jet while vacuuming. Will try that if my powerful x stream 1.5 hp motor doesn't blow a hole right through it.

  8. Back To Top    #8

    Join Date
    Apr 2014
    Location
    Mobile, Alabama
    Posts
    75

    Re: Recent sediment at the bottom of pool

    I have the same stuff in my pool. I'm thinking it's either pollen, dust, or some manner of silt. The only way I've ever been able to get rid of it is to vacuum to waste, but eventually it'll reappear. It doesn't feel like anything to the touch because once you touch it, it dissipates into the water. At least that's what mine does. I've used filter clothes over my skimmer basket, but nothing stops it unfortunately. Maybe one day I'll figure out a way to get rid of it. Until then I just kinda live with it.

    Kevin T
    16' x 32' Vinyl Liner Grecian Pool. 20,000 Gallons. Sta-Rite SuperMax 1HP Pump (PHK2RA6E-102L). W. Cooper Ranger Series 25" Sand Filter. Dolphin Nautilus Plus.

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