What's gonna eat this algae?

[jvision]

I've got some algae starting to creep into my system. I'm thinking that I don't have enough hermit crabs (about 6 in a 37+10g sump). Here's some pics:





Is there something small and peaceful that will take care of this?

I'm planning on lighting up the sump for some macro - I'm guessing that this will help a lot, too.