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Thread: Do I need to worry about this?

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    Do I need to worry about this?

    I'm currently in the process of shocking my pool for mustard algae. I've scrubbed just about all the surfaces, but there is an area I'm not sure about. It is around the main drain, in the deep end of the pool. There is a large area of brown stains that I can't scrub away, and they don't look that much different than the mustard algae on the side of the pool. However, the main drain gets a fair amount of sun, so I'm thinking they really might be stains. The only way I can get to the spots is with the pool brush because it is in the deepest part of the pool. Using the pool brush, nothing brushes away in that area. However, it is also the farthest spot I have to reach with the brush, and I may not be able to give a scrub good enough to dislodge any algae. I'm posting two pictures of the spots, though they aren't that great. It is breezy today, so the rippling water surface impedes the view.





    Should I be concerned?

    Thanks,

    Kelley
    Kelleyaynn
    21,000 gallon (+ or -) in-ground plaster pool with Nautilus DE filter, 1 hp pump, and Zodiac G4 automatic vacuum.

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    Join Date
    Jun 2011
    Location
    Miami, OK
    Posts
    8

    Re: Do I need to worry about this?

    Not sure what your stains are.....I will leave that to the forum experts. But I had an area around my drain that looked a bit similar. I had to dive down & scrub it pretty good w/ a brush to get rid of it. Just brushing by standing alongside the pool did not give me enough leverage. Once I had it removed and kept my pool at the right adjustings.........it has not come back......so I assume it was some kind of algae (as I was in the process of switching over to BBB and had a moderate algae issue.
    Gunite pool. Pool = 21,500 gallons w/ a hot tub = 606 gallons that overflows into the pool. Of course when weather is hot I do not turn the hot tub on...but continue to let it overflow into pool [because it looks nice!] Converted from Pristine Blue to BBB at the end of June, 2011. SunRay auto vacuum. StaRite Sand Filter. LOVE BBB! It is so simple & easy & inexpensive!

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    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
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    30,077

    Re: Do I need to worry about this?

    Simply a guess but the stain looks organic. It may get removed with a vigorous brushing by diving down to it or it may take several of those with your chlorine help up high to help kill the stain. Again, just a guess.

    Hold a trichlor puck firmly down on the stain and see if that lightens it.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Do I need to worry about this?

    I don't have any pucks (just gave them away on Freecycle because I was doing BBB!). Tomorrow I'll try to dive down to do some scrubbing, but I'm not sure that will be feasible; it's in the deepest part of the pool, and I can't dive down easily and stay there long enough to scrub. But we'll see. I may just have to hope for the best. Some of them at least might be plaster patch. There are several patches around the pool that look very similar in color. But probably not all of the spots.....

    Kelley
    Kelleyaynn
    21,000 gallon (+ or -) in-ground plaster pool with Nautilus DE filter, 1 hp pump, and Zodiac G4 automatic vacuum.

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