The whole tank is hideous looking from all the hides holes in there and moss. I'll eventually tidy it up. Heehee! Mine are in with about 50 shrimp right now. Fortunately that one that lived for about a week was by himself so I could get a good look at him. So I hope I cAn tell the difference if these manage to make it. My other female is sterile as far as I can tell. She berries but all eggs turn orange and fall off.
Acity I have only witnessed a cray eating a shrimp one time. No idea if the cray killed it though. The shrimp are too fast for them. I wouldn't keep expensive shrimp with them but I've just got PfRs and Supremes in there.