I'm new at fish keeping, so rely on the internet for advice. The advice about keeping different species of shrimps appears to be wrong. I was having a problem with algae, so decided to get some shrimps. I bought 4 red cherry shrimp (it's only a 5gallon tank). Five weeks later, they all looked healthy and were growing but weren't having much effect on the algae, so I decided to add some amano shrimp. I checked first that they would be compatible and the advice was that all varieties of shrimp will live peacefully together. That was a week ago and I have just found the bodies of two of the red shrimp and the others have disappeared. I haven't done anything differently so the conclusion seems to be that the amano shrimp killed them.