Crabs in a sps tank

[marvelousone]

I caught my blue leg crab picking on tri color valida. I notice them, I believe knocking frags over. Those that have SPS only tanks. Do you have crabs or not. Should I pull them out. I have two in there. What would be the best clean up crew for SPS only.

 

[bubbaque]

I have emerald and hermit crabs in my tank. I don't believe they ever caused an issue.