I’ve been scouring images on google and such .... what I though might be dinos looks more just like brown nuisance algae to me now... I vacuumed a bunch of the back wall of my aquarium yesterday... I did see some stringy bits which made me think dinos but there were very few and no air bubbles... plus it seems to mostly be on the back wall we’re my third power head is pointing at for flow behind the rocks... the parts on the rocks the snails were eating it it looks like.. some of the more dense spots sort of look like hair blowing in the breeze.. a few pics: