ok so I think I have a problem. ive got 6 black skirt tetras in my 29 gallon and lately I have noticed they are very nippy with eachother. I don't know whether I got all males or not. I was wondering if I could transfer two to my 10 gallon so there would be 4 in the 29 that might let them have a little more room to themselves. they rarely school together. I think ive only seen them do it twice.