Depending on how big they are they might have killed them. Ive had large 3" amanos eat fish alive... Ive also read on here other people having similar experiences of agression. But be cause thet are caridina and closely related it is also a good possibility of a disease or something. (hopefully not) good luck on fixing the problem.
I get them next week, and I'm excited but a bit torn. I got some amanos from a pet store and placed a couple in each tank to remove some algae but since I've placed them in the shrimp tanks, I've had 3 deaths! Probably not from them killing the CRS and Golden bee but maybe from some yucky waters at the LFS. I dont want it to spread.
just got some seiru rocks for the 12GL for $4.95/lb at midway. You should definitely come up and check out midway pet when you have the chance. They got blue pearls CRS CBS Fires cherries cardinals velvets blue bees rilis. Alex is their shrimp specialist