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Hopefully it's the sequestrant and not algae. We were fighting with algae for about a month and the water was so clean and clear before this stain removal process. I used Metal free because the pool store guy suggested that. I will try to bring the chlorine up and see how it goes.

We are new pool owners. We have a 30,000 gunite pool which we opened a month ago after buying our house. The water was a dark green and we managed to bring it back to a clear blue with the chemistry perfectly balanced. We had some pretty bad stains and on Tuesday, I used ascorbic acid followed...