green carpet algae?

[Maverick00]

Having some weird green carpet looking algae in an area of lower flow in my tank. Ive been doing 10gal water changes weekly for the past couple months. The only major change i can think of is ive been feeding enriched brine shrimp to my fish a few weeks before i saw this. Ill try to get a picture tomorrow. Parameters are in check. Anyone know what this could be or what its called? It peels up from the sand as well and moreless stays in tacked.