Well, seeing as how I had tons of algae in my nano 2.5g and I had glosso in there along with petite nana and dwarf hairgrass, I'd say, it wouldn't help. But then again, I dont have as much lighting as you do. That might be the root of the problem. With that much light, from what I've read, it's going to be almost impossible to keep algae from growing.
As a side note, I have an 11watt CF bulb over my 2.5 on for 10hrs. daily. In the beginning I had an outburst of brown algae, a little hair algae that came with the plants, and some green algae (I actually want this algae). It has been a few weeks, and now things are starting to balance out. Mostly all that grows now is green algae. The brown algae has died off a to a huge extent.