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Hello - I have yellow stains on the bottom and sides of my pool that I think is yellow algae. I recently neglected the pool and FC was zero, and leaves are falling in the pool, and lots of rain, etc... The yellow is mostly on rough splotches of plaster, and more on the shaded areas of the pool...

I just got my TF100 kit and CH was very high, with these results: FC 6 CC 0 CH 575 (10 ml test) TA 90 CYA 70 PH 7.8 I was surprised by the CH and measured it several times. Then I had Leslies measure CH twice on 2 different days with 2 different employees and they got CH = 260 and 270. I had a...