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How can you get rid of brownish green and dark stains on wall have treated the pool for copper but it hasn't worked how can you get the stains off without emptying the pool marbelite pool?
Wiki User
∙ 15y ago
If the stains are more than a few hours old you will have to drain the pool to do an acid wash. Another alternative is to do what is called in the industry a "no-dran" acid wash - and yes the spelling is correct there because it is the manufacurer's way to spell it. The product is put out by United Chemical Co in California. Possibly in Simi Valley. Can be found in most major pool stores at times. You must follow all the instructions on the container or it will not work properly. You also must know when to stop the process. It is best for a professional to do this type of work. If trained properly he will know when to react to the different chemical situations that are involved.
Wiki User
∙ 15y ago
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