I have 12 Amano shrimp in my 75g community tank, so they have a good amount of room to move around. I got them because I've never had shrimp before and thought the idea was cool, but also because of their algea eating ability. I notice ALOT of people talking about RCS and CRS and I'm wondering why? Not that I have anything against them, in fact I was thinking about adding some RCS to my tank. I'm just curious if there is something that I dont know about them? Something that makes everyone want them? Or, is it just looks? I'm a big fan of Amano's but, lets face it, they aint the prettiest shrimp in the world.