Need help with Algae ID

[Twinn]

Noticed today that one of my rock exploded with a brown hair type algae. Can't seem to find an ID for it anywhere. It is on the rock that I dose MicroBacter7 on and I did find a little information that MB7 with vodka dosing may cause a brown fur, hair type algae. All parameters on the tank are good. I realize the algae could be eating up PO4. I took the best picture I could hopefully you can help.