Well, I was at the fish store last night getting a few tetras for my 20 gallon and I was looking at the Otos, they all looked fat, happy and healthy, should I grab 1 more to replace the little guy I lost, or is just 2 better for a 5 gallon? I know they do best in groups, if 2 is a big enough "group" i can leave them as is, but I think htere's probably room for a 3rd? Any and all thoughts / suggestions / opinions welcome! thanks!!!
