Looking to ID Algae in Sump

[DKoKoMan]

Originally Posted by kien

wow, that's some nasty crap. Sorry, I'm no help on ID here. To me it looks like fish poop mixed in with something that died or is in the processing of dying and decomposing. Gross.

Nothing has died in the tank other then my chaeto. I swear it grows though!!! I pull it out all the time with a turkey baster and it comes back. That’s why I think it’s an algae of some sort.

I literally take my prefilters to the car wash to spray this crap out as it does t rinse away.

Hopefully someone knows what it is and how do I get rid of it...