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Thread: Adding Absorbic Acid

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    Adding Absorbic Acid

    How long after adding absorbic acid (Stain Free) and Metal Free can we swim?

    Thanks for your help!!

    East TN
    13,000 gal San Juan Fiberglass Pool;SWG; GoldLine Pro Logic Controls
    Hayward Sand Filter; Hayward Max-Flo XL Pump;Polaris 380; Hayward ColorLogic LED
    Raypak Gas Heater

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Adding Absorbic Acid

    Because ascorbic acid depletes all of the chlorine in the pool (which is why one usually uses PolyQuat 60 algaecide during the process to help avoid algae growth), one should not swim during this process. After the stains have faded and you've added metal sequestrant, then you slowly start adding chlorine. Once you start measuring a chlorine residual getting close to the recommended Free Chlorine (FC) level for your Cyanuric Acid (CYA) level, then the pool is safe to swim in again.

    Now "safe" is always relative and it's your own pool so you can always do whatever you want, but when there is no chlorine in the pool, bacteria can grow quickly and depending on what kind of bacteria are growing, this can become a problem if you take in too much that overwhelms your immune system. Though the risk is low, it is far far lower when chlorine is present.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  3. Back To Top    #3

    Join Date
    Aug 2009
    North Central Texas

    Re: Adding Absorbic Acid

    Just wanted to add that I was advised by one, or more, of our esteemed contributors that the lower the temperature of water is the longer it takes. I did the AA treatment successfully last month. My water temp was about 63 so it took well over a week before all of the stains lifted. During the whole process the water looked great. Actually there was a bit of staining left in one area when I started to bring numbers back to normal but it lifted in a few more days.

    It was too cold for me to swim of, course, but the doggies did. One had a Vet appointment yesterday and he had an ear infection that we didn't know he had because he hasn't been shaking or scratching his ear. I'm not sure if he picked it up from the unchlorinated water or had it before starting the treatment. Just wanted to let you know.

    1981, 25K, IG, Blue Plaster 1996, somewhat oval, widens a bit at shallow end, 1.5" pipes, 2" at Pad, 1 separate main drain, 1 skimmer, 4 returns + dedicated cleaner return, 10 ft deep end with very fast decline from shallow, Pentair Quad 80 DE, Pentair Intelliflo VF, 3/4 HP Booster Pump (equipment pad about 8 ft below top of pool), Challanger 3/4 Trash/Emergency Pump 120v, Polaris 280 (pressure), iRobot Verro cleaner (robotic), Aquabot Turbo (robotic), Jacuzzi Tracker 4X (vacuum) Pool Blaster (Buster), Two (2) PoolSkims, Solar Breeze (solar powered top skimmer) (beta to ver. 2, release date 2010), ColorSplash LED replacement bulb. Aries 550 gal separate spa, 2002 (our 3rd and BEST spa) , BBB-Bromine

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