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 dont 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.