def. get more than 1 oto...I would choose either corys or otos...and get a group of thoseI had 3, but lost one so I have just the 2 now. A pink one and a yellow one. They are pretty cool... I have them in my livebearer tank. They hang way at the top, so one one really bothers them. If it were me...in a ten, I would get like 4 or 5, two corys, an oto or two and call it a day.