Today I called up the folks at
www.garf.org and ordered one of their reef janitor packs. Essentially a total of 82 hermits and snails to control the algae in my tank. I have a really big red diatom bloom going on right now and the few snails and crabs can't keep up. They'd much rather eat other stuff. I think this is definitely a case where large numbers will help. The one end of my tank where the majority of substrate came from the old 60g tank is becoming carpeted with red algae.
In addition, whenever you order a janitor pack, they include a free coral frag from their clippings. I don't know what I'll be getting so it will be interesting to see. It will all be here Thursday. I'll post pictures.
They also offer frag packs at 5 frags for $100, and they throw in two more for free. I may consider this when I'm ready to really start adding corals.