Thanks for your help. Sorry I posted twice earlier. I'm new and didn't realize it was just waiting for moderation.

Well, we decided not to drain. I've been sweeping the bottom and scooping out more leaves and leftover animal tissue. The stench is not as bad.

Our first goal will be to get it more clear so we can see what's still in there.

Husband isn't interested in switching to chlorine as we have lots of bromine.

So, once we get it clear, you think it is sanitized right? That could take a long time!