Is it safe to add glass or cherry shrimp to a tank with clowns or will the clowns think I've added a live snack to the tank? The biggest of the clowns is about 4 inches. Also, there is a lot of flow in the tank (55 gallons; Fluval 304 canister, AquaClear 50 power head and an Emperor 400 w/bio wheel), can the shrimp handle all the water movement?
The LFS said there "should be no problem", but I wasn't really getting a good feeling from the guy since while I was waiting I saw him putting some of their clown loach shipment into a brackish tank

I told him I thought it was a pretty bad idea, but it went in one ear and out another. I will be back there today and if the clowns are still in that tank I may have to rescue them
Also, do the shrimp have any specific water requirements or am I safe to assume that if the water quality is good enough for the clown then I'm all set?
Thanks