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Thread: Stain Stop

  1. Back To Top    #1

    Join Date
    Jul 2008
    Seacoast, NH

    Stain Stop

    Had my PB open the pool on Tuesday. I knew they'd put algaecide in, they always do. They use one with no copper so I've always just let it go. But I just got the invoice and they also put in something called "Stain Stop." What the heck is that. I've googled it and don't see it. This is summer 9 of the pool and we've been using TFP since Day 1, so I know I don't need it. I just want to know what it is.

    Now I'm going to have to let them know next year not to put in anything. The algaecide + the Stain Stop came to $51. 51 bucks for useless stuff.
    19,000 gallons
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: Stain Stop

    It is probably a sequestrant to prevent metal stains. Something like Jack's Magic.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  3. Back To Top    #3
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Stain Stop

    There's a Stain Stop product by EZChlor and one by Poolife (Lonza Chemicals). The MSDS for the EZChlor products shows it to be a mixture of dry acid (sodium bisulfate) and sodium erythorbate which acts a lot like ascorbic acid in that it dissolves metal stains. Unfortunately the Poolife product has no online MSDS but, if you email Lonza Chemicals, the parent company, they will provide one. I suspect their product is likely similar to the EZChlor product - an acid + a mild metal chelating agent. The Poolife product line has an "Pool Opening Kit" which contains some shock chemical and a stain lifter.

    But your gut feeling is correct, you don't need any of it. If you closed your pool yourself using the process laid out on TFP then opening would be a snap. Most pool owners that follow the opening/closing procedures here find their water stays clear through the winter and is easy to quickly get balanced. If you're physically unable to open/close your pool, I understand that and would simply agree that you need to tell the pool service company to forget all the chemical stuff and you'll do that part yourself.
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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