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FC 3.5 CC 0 PH7.5 ALK 80 CAL 200 CYA 60 I have been fighting this all spring and summer. It shows up when I let my Chlorine go low. Initially, I thought it was DE from a DE leak I had where all of the DE leaked into the pool. It comes off very easily. I can vacuum it off of the sides. If I...

I thought this was algae. It was green when I started and I raised my shock levels to 30 for 3 days now. The algae has changed color, but it is stuck to the walls and floor. I am brushing it with a wire brush, but that only fades it a little bit. It is certinatly getting better, but it is...