Bubble algae should I buy and emerald crab?

[MikeP]

I've noticed a very small amount of bubble algae in my tank. Like 4 or 5 bubbles. Should I run out and buy an emerald crab? Or is that jumping the gun a bit. What else eats bubble algae? If the only thing I can do is buy and emerald crab what tank mates can it have? I would be worried that it will fight with my CBS and my hermit, or even eat my very small zebra hermits.

Thanks for any info