Thanks so much for all of the information on this site. Our pool has been Baquacil from the beginning. But after opening to white mold again this year - and not yet been able to swim in it (and it is mid July already) I decided it was time to switch. I went from Baquacil to Chlorine via the instructions here and everything has happened as expected so far. I started this past Sunday. Went through the green, then goo stage. Removed all of the goo via skimming, brushing and vacuuming to waste. As of Wednesday evening my pool has been totally clear. It's been that way for three days now - sparkling clear - but I still am not maintaining the chlorine levels overnight. I've cleaned the baskets, I have no stairs or ladder so nothing inside the pool to have remnants of Baquacil. Been brushing in am and pm. This morning there was a tiny bit of substance at the bottom that I vacuumed to waste. I'm wondering if I should just go ahead and change the sand in the filter. Perhaps there is a lot of Baquacil there yet? I've only had to backwash twice since starting the process based on pressure. Yesterday the FC was 9.4 in the morning and today it was 9.5. So still loosing considerable chlorine. Does anyone have any ideas or suggestions? Thanks again!