Okay, so I decided to switch Sequin to the 3 gallon KK since he's so big, and has looked depressed since I redivided the tank. Blush is now going to be in part of the 10 gallon instead of the 3 gallon. I just think it's more fair to Sequin. He is HUGE compared to my other boys, and I want him to be as happy as possible. I think it will be the best decision overall. Also, Blush will be next to my least aggressive Betta, Sir Lefty. So I shouldn't have that many problems. He's the most mellow guy in the world. Also, my dividers are semi-opaque, so they'll hardly be able to see one another. Can't wait to get my Plakat, either!