You could use the 1-2 punch method as described in the algae sub-section in this forum. It might be the solution you are looking for if you are nuking your tank.
For hardscape, I periodically take mine out and hit it with glut (I I dilute gluteride with water 40/60), let it sit for a half hour, rise well and return it to the tank.
Both methods kill the algae, but do not remove it. Once algae is dead, amano shrimp tear it up. So if you were thinking about getting a couple for this tank anyway (which by the sounds of it, might be a good idea), then these methods could be the way to go for you.