Apparently the red cherry are pretty hardy as shrimps go, so that's why I started with them, although regular water changes are req which is no different to keeping any other fish I guess. Red cherry shrimp can live in a wider range of temperature and PH levels from what I've read. As far as predators I guess that all depends on what you have in your tank e.g I don't think they would last long in a cichlid tank setup unless you had lot's of hiding places for them. A planted tank would also be the best bet. I kept 5 in my community tank (see my sig for the fish in there) and they were all ok in there but if you wanted them to breed then they would need to be kept in a shrimp only tank with maybe a otto in there as the only fish that seems to be widley regarded as safe, again this is my opinion from what I've read.