I added more...provide more information as suggested above.
The first move would be to find a new home for a couple of the fish. I would say the Blenny and the Domino Damsel. The Domino will grow real fast, and the Blenny will probably starve as they don't normally take prepared foods. Does he eat when you feed the other fish? What are you feeding anyway?
For more information on algae control click on the link in my signature "Written by Myka" and then click on the Nuisance Algae link.