Re: Mustard Algae? Or chemical stain?
Thanks for the replies--
To answer the questions, municipal water source, and I don't know about calcium. Can't even remember if theres a test for that in the great blue bucket.
No heater either.
I've tried scrubbing with a plastic scrub brush, and green scrub pads with no noticeable difference.
I'll suffer through the controlled drainings to knock down the CYA. Seems like when I drain over the winter, it would help that out, but I guess not enough!!
above-ground 15'x30'x3.5' oval -- Hayward 1.5hp Power-flo matrix, Vari-Flo XL -- Swim Pro 3.2 sft sand filter, 250# of sand
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