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  1. C04ED3D7-CD6E-4658-A180-21C445FC60C1.jpeg

    C04ED3D7-CD6E-4658-A180-21C445FC60C1.jpeg

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    Stubborn (algae?) Stains on Plaster Walls

    Yea so that’s the thing - it’s possible it’s been there all along and I’m now just hyper sensitive about it after the algae bloom. That said, and it’s really hard to capture in the photos - it definitely has a green tinge to it across that entire south wall of the pool. Including another...
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    Stubborn (algae?) Stains on Plaster Walls

    Here are some of the stains. As mentioned, I'm having trouble capturing on camera. It looks much more obvious in person and spreads across the South face of the pool.
  4. IMG_1510.jpeg

    IMG_1510.jpeg

  5. IMG_1512.jpeg

    IMG_1512.jpeg

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    Stubborn (algae?) Stains on Plaster Walls

    Hypothesis - though can't wrap my ahead around it... we've got pretty hard water here in San Jose (glass shower doors tell the story if you forget to wipe them down after even just 1 shower). My Calcium readings seem to be within the acceptable range, but certainly at the high end. Is it...
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    Stubborn (algae?) Stains on Plaster Walls

    I don't think so... I haven't used Algaecides (thanks TFP for steering me well away) and don't have a heater or ionizer. Shouldn't be any copper plumbing anywhere. FWIW (I know, not worth much!), before I purchased my test kit and had Leslie's (I know, I know... now) test my water, they...
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    Stubborn (algae?) Stains on Plaster Walls

    Ok... so the images didn't attach for some reason. Trying again but it's not working. I'll get them added if I can figure out the problem!
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    Stubborn (algae?) Stains on Plaster Walls

    Hi all - hoping to for some experience and guidance on stains that I'm dealing with in my pool that I haven't been able to identify or clean. Been fighting algae this summer, finally decided to do a SLAM, as well as taking up to mustard algae shock levels afterward. 1 year pool owner, trying...
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    Mustard Algae questions

    Curious on the discussion of CYA upwards of 80. My understanding was that you don’t really want CYA getting much over 50-60 at the high end. What would be the reason to bring it all the way up toward 80?
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    Built-in Concrete Skimmer Questions (equalizer valve? -- cement crack? -- vacuum?)

    Am I right to assume that I'd need to drain the water down below the crack and let it dry out before applying? Or is there a special kind of epoxy putty that can be applied under water that I get from my local pool store? Or even just the stuff at the hardware store?
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    Built-in Concrete Skimmer Questions (equalizer valve? -- cement crack? -- vacuum?)

    Bumping again and also an update. Regarding the slimmer crack - I do believe it is a leak point. I filled the pool yesterday to the top of the skimmer opening. About 18 hours later, with only about an hour of the pump running at the end of the day yesterday, I’ve measured about an inch of...
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    Built-in Concrete Skimmer Questions (equalizer valve? -- cement crack? -- vacuum?)

    Bought a house in San Jose CA a few months ago with an inground pool. Not sure when the pool was built, but house was built in 1957. Pool was replastered 1-2 years ago. So I’m new to pool ownership and maintenance and trying to learn as I go along. The skimmer didn’t seem to be working well...
  14. skimmer photos.002.jpeg

    skimmer photos.002.jpeg

  15. skimmer photos.001.jpeg

    skimmer photos.001.jpeg