Experiencing same problem as above. Hair algae and green water. 72 g, red sea berlin protein skimmer, wet/dry (used carbon in filter for 8 hours, phosphate sponge for 28 hours). Collection cup was hella GROSS 8O (pee-you).
Did the wrong thing by moving the tank and then using tap water to fill the tank (bad idea). Result, this mess.
Now, I have to go with on last cure, put move water movement. That is my suggestion. I have tried all the others, and so far the algae isn't growing as much, but plan to erradicate it this time. I have already "toothbrushed" every inch of rock.