Shrimp problems?

[cg5071]

Does anyone know if 2 sexy shrimp would be ok in a 5g with 2 little green banded alpheid shrimp? Pistols but very small, bigger than the sexy though. I need to move some rock and they were in there snapping today but I didnt have a clue which rock? I would prefer to use the rocks they are in as it has some red algae on it and both other tanks have either turbos or tangs.