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Thread: Milky White "dust" on the bottom of the pool??

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    Milky White "dust" on the bottom of the pool??

    I just took a dip and when I touched the bottom of the pool a milky white dust like material came up. The pool was cloudy but I got it clear and it has been clear for a number of days now. Is this the leftovers and how do I get rid of it?

    20,000 gallon inground Marquisite pool, Florida, Chlorine and cartridge filter. I use 2 capfuls of phos Free Weekly every week to try and keep the Algae away and a chlorine floater with 3 new Valuechlor Brand "hockey pucks" every week and clean the cartridge every week. We also use a Sharkvac pool cleaner and we have a built in floor system running whenever the filter is on as we have a lot of trees right around us and no screen. I have the water tested at Pinch a Penny every week and if total Chlorine is between 3 and 5 they tell me to just do the floater but since I had a problem, I put in a 2.5 gallon bottle of liquid chlorine last night anyway (and becasue my sister told me to).

    Working really hard but not sure at the right things......:}
    Winter Park FL
    10,000 gallons, 1.5hp pump, DE Filter, Marbletite Surface

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Milky White "dust" on the bottom of the pool??

    This is going to sound short but you need to read Pool School until you understand it. You're being pool stored, and badly.
    Post a full set of test results and how you got them.

    We'll be glad to help you once we know those things.
    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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    Join Date
    Apr 2011
    Houston, TX, USA

    Re: Milky White "dust" on the bottom of the pool??

    milky white dust material is something i saw once when i put a phosphate treatment in the pool last year (i had not discovered this site back then). the phosphate treatment was granular instead of phosphree which is a liquid. at the end, everything rested at the bottom of the pool and I had to vacuum it out.

    I am never doing that again of course.
    14500 gallon plaster pool (replastered in May 2009) : 32ft.L x 4ft.D x 14ft.W
    Pentair FNS Plus 48 sqft DE filter
    Polaris 280 at 2hrs per day (retired now) & Aquabot T-Jet Turbo used as needed
    Circupool RJ30 SWG set at 80% output & Pentair SuperFlo 1hp 2speed running 6-8 hrs/day in the summer

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