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Thread: Staining from Trichlor puck?

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    Staining from Trichlor puck?

    I have several stains in the bottom of my pool. All of them start at about 3" round and have a comet like tail heading toward the main drain. This is obviously where someone in the past has tossed trichlor pucks directly into the pool. What kind of stain would this be? I would expect to see pitting (and do) but not staining. Any ideas?
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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    Butterfly's Avatar
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    Re: Staining from Trichlor puck?

    What color is plaster? What color is stain?
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    Re: Staining from Trichlor puck?

    White plaster, brownish stains mostly. Around some of the clearly defined round area there is a blueish tint
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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    Re: Staining from Trichlor puck?

    3 inches, brownish stains with a bluish outlining tint? I could be wrong of course, but I wonder if someone dropped 3 inch pucks that contained copper down there, like the HTH super-guard or whatever name they go by this year. Maybe test for metal stains?
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
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    Butterfly's Avatar
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    Re: Staining from Trichlor puck?

    Quote Originally Posted by Donldson
    3 inches, brownish stains with a bluish outlining tint? I could be wrong of course, but I wonder if someone dropped 3 inch pucks that contained copper down there, like the HTH super-guard or whatever name they go by this year. Maybe test for metal stains?
    Exactly my thoughts, too.

    Do you have some dry acid? You could put some in a sock, dip it in pool/hold it on the stain for a couple minutes and see if it clears.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
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    Re: Staining from Trichlor puck?

    I think you guys just nailed it. I wasn't aware of pucks that contained copper. They became more pronounced when I SLAMmed the pool. Isn't this consistent with copper as well?
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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    Butterfly's Avatar
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    Re: Staining from Trichlor puck?

    Yep. It appears the previous owner did use copper containing tabs.

    Raising the FC to high levels, or allowing the pH to get high will cause metals to fall out of solution and deposit on the pool surface.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
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    Re: Staining from Trichlor puck?

    This guy was way too generous. He left me with triple digit CYA, mustard algae, a plumming leak, and now copper as well. I wish I had tested for copper. I would have drained the pool completely instead of just reducing the CYA and then SLAMming.

    Some people don't deserve a pool. Too lazy to even use a floater!
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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    Re: Staining from Trichlor puck?

    You might want to go to a Poo... Pool... Pool St... (such a dirty word, I can't even say it) and get your pool tested for copper. I think they usually get that test right. Have you already drained and refilled to lower the CYA? If so, that would have lowered your copper level, too.
    John
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    Re: Staining from Trichlor puck?

    I dropped it down to 45. There was no way I could do a mustard SLAM with triple digit CYA. I never did actually make it all the way to mustard levels. I had to hold at about 75% for a longer time frame. It's super tough to hold a pool at 40ppm FC. It's likely what caused the copper to make an appearance. Nice to know that the partial drain might have saved me even more staining.

    I'm due for a replaster so I may do a full drain in the off season and get a nice shiny white finish and a fresh batch of water.
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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    Mod Squad jblizzle's Avatar
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    Re: Staining from Trichlor puck?

    Seems that no one ever follows the proper procedure for mustard algae ... did you read this:
    pool-school/mustard_algae

    You are only supposed to elevate above normal shock level after you pass the 3 criteria that say you are done. Then elevate the FC for a day after that.
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    Re: Staining from Trichlor puck?

    An hour ago I would have told you I did, but that is not the process I followed. I used more chlorine than I had to but the mustard algae is still gone.
    ~16.5Kgal free form plaster with spill over spa
    1 1/2 HP Pentair SuperFlo pump, 1 HP Polaris QT Spa Blower, Pentair 48sqft DE Filter, PoolPilot Digital Nano+ SWG

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