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Thread: Best metal sequestering agent?

  1. #1
    Join Date
    Jun 2014

    Default Best metal sequestering agent?

    There is Magenta stuff, Purple stuff, Pink stuff and blue.. etc. For copper at 0.2 and mostly everything else is fine with salt at 3400. What would be good to maintain the copper. When I opened it on day 1 by day 9 it is clear and crystal. Now it is getting stains again. I cannot drain the pool all the way and maybe just a metal sequestering agent will do. Which one do I need?
    18 x 36 Liner Pool. About 1975 built in ground
    22,000 gallon, Hayward/ Jacuzzi Sand Filter
    Aqua pure Salt Water Generator, Chlorine Tab Dispenser
    1Hp super Pump

  2. #2
    Join Date
    Sep 2014
    Tucson, AZ

    Default Re: Best metal sequestering agent?

    Metal sequestering agents will not remove metal stains on their own. If they are metal stains (I answered your other post by the way), then you will need to perform an ascorbic acid treatment prior to adding any sequestrant in order to dissolve the metal stains back into the pool water. Metal stains are precipitated metal salts on the liner material, so you first need to redissolve the metal salts and then use a sequestering agent to help keep the metal ions in solution.
    16k gal IG gunite PebbleTec (Caribbean Blue), 18' x 36' free form with raised spa/spillway and separate rock waterfall. All Pentair Equipment pad - 3HP IntelliFlo VS / 1.5HP WhisperFlo, MasterTemp 400k BTU/hr heater, QuadDE-100 filter, IC40 SWCG, IntelliTouch/EasyTouch Controls

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