We picked up our first house in late 2008, and they had emptied/cleaned/refilled the pool. While we worked on other projects (old house) we had no time to swim and kept the sucker chlorinated and killed off the occasional greening until I fell ill in mid-2009. During those months the pool occupied the back burner. Not a good situation, lol. It went green, then black. As it sits now we scrubbed the bloom and chlorinated it half to heck, so the shallow and middle portions are pretty clear, with the deep end having up to 6" of black goo by my estimation. That disaster aside, we'll be keeping the pool ourselves once we get a cleaner to remove the nastiness...or do it ourselves if possible. I need to look up and see if the built-in pump can be used to drain us down/vac out the goo, but I digress. Off to browse/learn, thanks for the site.