I think I fixed the pool.
The acid rinse through the cell worked like a charm.
The ChlorBright shock powder brought up the chlorine levels and wiped out the bad smell (and most of the green gunk - the creepy cleaner is getting the rest).
Thanks to the guy at Leslie's Pool Supply who answered all my questions and was nice to boot. Leslie's Pool Supply never lets me down.
PS - you should have seen me in all my safety goggle/safety mask/rubber gloved glory. I'm pretty sure I was an impressive sight. Ask the kids and my friend Beth. They watched my mad pool skills in amazement :)