Sorry to hear about the stink of it. My green just smelled like a pond. My novice approach would be to keep aeration going and not kill any of it and hope that it runs it's course. Keep in mind I said "NOVICE" and that's an exaggeration.

It seems to me that the "stuff" is thriving on the nutrients in the pond and killing it would leave the existing nutrients there and add the nutrients of the stuff. Is there any practical logic in my thinking? I don't know, but I feel for ya!

Fish on!,
Noel