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I just bought this house in Dec. 2012. The previous owner had left the gunite pool uncovered for two, if not three, years. In April 2012, the pool was practically empty and looked like it was in decent condition. By the time December rolled around, it was filled to the brim with black water. Fast forward through winter and now spring. In an effort to keep the Mosquitos at bay, I had it drained to acid wash it. Well, I am told it's a minute away from concrete and couldn't withstand an acid wash. The problem is the bottom of the pool is completely black. There were almost two feet of leaves covering the bottom when we drained it. I don't know what the black stains are - black algae, tannins, metal reaction (there's a lot of iron in the water here). Someone suggested painting the pool with an epoxy paint, but if it's algae, wouldn't that be a bad idea? HELP!
