black(charcoal) stains

Stains on the pool surfaces, pool equipment
or on the swimmers, or off-color swimming pool
water. Discolored but clear pool water.

black(charcoal) stains

Postby cwos » Thu 08 Jun, 2006 22:39

I have a new pool with a starting alk of 450ppm( holy thats what I said but had it checked over and over) any way after a week of adding acid I am noiw in the 200 range still high but this is taking alot of acid!!! and the water has cleared greatly but I am noticing blackish stains developing in the deep end walls and not able to scrub off.Whats happening and how do you make these go away!!!!!!!PS ph is staying about 7.2-7-4.


Re: black(charcoal) stains

Postby elvinp » Wed 04 Apr, 2007 11:08

Did you ever find a solution to this problem? I am having ht e same issues and no one can figure it out.


stains on pool deep end wall

Postby makajo » Thu 14 Jun, 2007 08:07

i have same issue, what is it?
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Postby Buggsw » Fri 15 Jun, 2007 10:22

Sounds like metal in the water.

Have your water tested for metal. Could be copper or iron.

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