OMG! I would have lost it right there where it turned yellow. A fascinating slideshow, thanks for posting it.

I'm forwarding the link to a friend who switched from bleach to Baquacil because "I'm not a chemist". Whatever. Her pool now is murky and feels oddly soapy, and the water does awful things to my eyes. She recently told me it had turned green but the lady at the pool store sold her some chemical that cleared it right up. And her neighbour up the mountain has paper algea or something like that.

I'm trying to get my friend to go with BBB. She's coming to spend the weekend and we're hoping that once she sees how very little time it takes to "be a chemist" she'll consider switching back to bleach.

Though your photos will scare the you-know-what out of her