Another OT post. But there is a diverse groups of guys here. I have what appears to be "algae stains" on the vinyl liner of a gunnite pool that occurred after being shut down from Hurricane Ivan. (My mother's pool) It won't scrub off with the pool brush on a pole.
If anyone here is pool saavy I'll elaborate more and post a link to a pic I'll take tonight.
Vette owners have pools also right?? hehehehe
I tried to find a USNET group with swimming or pool in the title, but no luck.