I'm sure this has been talked about before, but I can't seem to find it. I currently have 4 otos that I would like to move to my betta tank(s). I was just wondering if I should take the betta out, rearrange it, put the otos in, then the betta so he won't be territorial? Or doesn't it matter? And how many otos should I have in a tank? (They are both 10 gallon) I can get more otos before I move them if I need more than 2 per tank. The reason I was asking about the re-arranging is because I'm getting new(better) decorations for the tanks and thought it would be a good time to do both.