After having fought off green pool twice this spring, using bleach to shock it out. I have a pool which looks beautifully clear; except for the top step walking out of the shallow end. My chlorine level is running about 8, pH is a little high (like 7.8) but no big concern. CYA is at about 35.
doesn't fade with vitamin C tabs crushed and applied... why would I have this just on top step???
Any ideas? Requests for addition data are welcome, but my dpd powder turned solid blue over the winter, so no "high" chlorine readings available...