Hi, I've been lurking around here for a while. I've got a 25000 Gal (I think) Fiberglass pool in my backyard. It was here when I moved here, and I've been paying a pool service to take care of it for the last two years.
Lately, I've decided that I'm up to the task to take care of it myself. Daily attention should keep my pool in better shape, and I've found this site to be a wealth of information.
I bought one test kit, decided it sucks, and ordered the kit from this site. My plan is just to test the pool for a few weeks while the current service takes care of it, to get my feet wet so to speak before taking it over myself.
Anyway... I've noticed a couple of times, after the pool guys have been there that there is a weird purple precipitate all over my whole pool. Usually after the next week's visit, they've taken care of it, but I'm not sure if they resolve it chemically, or just vacuum it up or what. I have no idea what this stuff is. Before I take it over, I want to be ready in the event this reoccurs.
Anyone familiar with this kind of thing?