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Thread: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 300?

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    Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 300?

    I posted recently about calcium scale. It was recommended that I try getting it off with muriatic acid and a scrubber. I did that, and it actually got off a significant portion, but was kind of a pain, so I tried the bio-dex 300 my pool guy left for me. It is basically a few different acids and some thickening agents to keep it in place.

    It worked really well, actually, but some settled in a few spots on my pebble tec (mostly on the shelf, where the pool is shallower), and darkened the plaster between the rocks in those spots before I noticed it had settled. I brushed all the sides immediately when I noticed the first spots to prevent more, but there are still a few.

    The darkness looks basically like the plaster did when it was first put in, before it had fully cured. I'm assuming the BD300 ate away some/most of the calcium in those spot, but I'm not sure.

    My question is, what can I do? If I had to guess, I'd guess that they're going to fade on their own with time, as the plaster did originally, but do I have other options? My pool guy saw and seemed surprised. He said that an acid wash on the top step should blend it in. I've also emailed Bio-Dex to see if they have any ideas.

    I've googled, but haven't found anyone else reporting this. Mostly just ads/pages selling bio see.

    Thanks for any advice. I promise I'll listen this time.
    18,000-gallon-ish IG
    New (May 2015) baja shelf/Tahoe Blue Pebble Tec
    Jandy VS-FHP1.0 pump

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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    18,000-gallon-ish IG
    New (May 2015) baja shelf/Tahoe Blue Pebble Tec
    Jandy VS-FHP1.0 pump

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    JoyfulNoise's Avatar
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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    Looks like you removed the plaster creme from around the pebble aggregate. I would not mess with it anymore. The plaster is darker there and it should lighten up with age. Acid washing is going to remove even more plaster and could make the problem worse.
    Matt
    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 Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    That's kind of what I was thinking. Is it just darker because the plaster under the top surface is darker?

    /edit: Also, would a high chlorine level speed up the lightening at all? Like, a chlorine wash?

    I'm definitely going to err on the side of "not screwing with it", but if you think that's something that might help with little risk of making it worse, I'd be willing to try it. If it has the potential of bleaching out the other plaster, leaving me with two kinds of discoloration, I'll pass and just tell my wife to be patient. With me and the pool.
    18,000-gallon-ish IG
    New (May 2015) baja shelf/Tahoe Blue Pebble Tec
    Jandy VS-FHP1.0 pump

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    Mod Squad pooldv's Avatar
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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    No, I don't think higher FC level will help with that. I agree it is time for some patience, a float and !
    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

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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    Roger that. We did get our solar in, so we should be swimming sooner rather than later (once we get the leaky vacuum breaker replaced Monday).

    Thanks!
    18,000-gallon-ish IG
    New (May 2015) baja shelf/Tahoe Blue Pebble Tec
    Jandy VS-FHP1.0 pump

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    Mod Squad pooldv's Avatar
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    Re: Well, I didn't listen (kind of), and now I'm regretting it. Stains from Bio-Dex 3

    Good news! Solar panels are great!
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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

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