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Thread: Metal Control

  1. Back To Top    #1

    Join Date
    May 2007
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    Staten Island NY
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    Metal Control

    My friend gave me an HTH pool winterizing kit that included a Quart of Metal Control and a Quart of Algaecide. The metal control claims to prevent staining and the Algaecide (as you probably guessed) prevents algae. My questions are:

    What stains can you get from Metal?
    Can these stains affect a vinyl liner or just plaster?
    Does anyone have positive or negative experiences with these products?
    As they were free, are they worth using?

    Thanks,
    Craig
    -400 sq ft ingroung Fiji (straight back kidney) ~ 13,500 gallons - Vinyl Liner - 3 to 6 Feet
    -Hayward 1.5 HP Super Pump
    -Hayward Perflex DE Filter EC65A
    -Hayward H 250 Heater

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    If you have metals in the water they can deposit on the walls/floor of the pool causing unsightly stains. This process happens most easily in fiberglass pools, then in plaster pools, and least easily in vinyl pools. Basically, there needs to be far more metals in the water in a vinyl pool to cause stains than it would take in the other two. Metal Control is one of a great many products that bind to the metal in the water in a way that prevents it from depositing on the walls/floor of the pool.

    If you don't already know you have a problem with metals then I would not use Metal Control. Everything that you add to your pool has both positive and negative effects. If you don't need the positive effect there is no point in risking the negative effect.

    Algecide is typically added right before closing to precent algae from growing in the pool while it is closed. This is worth doing. However, there are good algicides and not so good algicides. The not so good ones are cheaper, and thus likely what you have. A not so good algecide can cause the water to foam and attracts insects to the water where they die and make a mess. Neither of these are too serious at closing time, so it is probably worth using the algecide.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    mbar's Avatar
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    Apr 2007
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    Ashland PA
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    I would not put in the metal control before closing even if you have metals - it will eat the chlorine, and it will also bring the ph down - and you don't want to do either of them when closing.
    16x33 fiberglass pool sand filter

  4. Back To Top    #4

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    May 2007
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    Staten Island NY
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    Thanks all. I closed the pool last weekend and only used the algaecide. If I open to any issues, you'll see my frantic posts for help in the spring.
    -400 sq ft ingroung Fiji (straight back kidney) ~ 13,500 gallons - Vinyl Liner - 3 to 6 Feet
    -Hayward 1.5 HP Super Pump
    -Hayward Perflex DE Filter EC65A
    -Hayward H 250 Heater

  5. Back To Top    #5
    mbar's Avatar
    Join Date
    Apr 2007
    Location
    Ashland PA
    Posts
    257
    I closed my pool last night , We'll be here to help next season, but i think you will be fine
    16x33 fiberglass pool sand filter

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