Hi there I've recently become a very big fan of stingrays and have decided to do some research. From what I've found they are a challenge to keep and not for beginners. I've been in the hobby for about 4 years and have kept everything from goldfish, to Africans, to tropical community, to large growing catfish and even saltwater reef. I would like some info on what you would view as the easiest out of the freshwater stingrays to keep and which are the smaller varieties