It’s brown hair and Cyano, I hired someone to come in and check. Nothing else present in the water. As others have mentioned, I think I failed to account for natural die off. At some point the excess nutrients caused algae. Phosphate is almost down to normal and I’ve got an order for a cuc to come next week. So hopefully that solves it.Theres also the chance it was some kind of poisonous algae that killed whatever tried to eat it. any pics of the algae?