I am thinking about getting a freshwater stingray. has anyone kept one of these before?? I have been looking for info online about them but I am not finding much of anything that is very helpful. can they be housed with other fish at all?? Feeding?? concerns with them??? ect..?? The one I am looking at I am told is a Ridik it is about 5inches??? I google it though and cant find any info under that name but it looks like the spotted rays so maybe I am just being told the wrong name?? thanks!!