Crabs and compatibility

[robbyville]

Hi folks,

Other than a variety of snails and one Sally Lightfoot crab I have no more crabs in the system.

I am thinking of re-stocking with 20 or so. Can you tell me what risks I run? Will Sally eat small hermits? Will they go after my snails? I also have a Flame Hawkfish, I know that I should not have any shrimps in the tank (gobble, gobble), but would he eat hermit crabs?

Thanks,

Rob