So I did some moving around today. My 6 inch bichirs graduated into the bigger tank. My babies, 3-3.5 inches are still in the growout. I also moved my betta in with the babies. Before anyone gets worried, the betta is 3 inches and shows no interest in anything except food. Including other male bettas (completely ignored my girlfriends when held beside the tank to see them flair.) The bichirs are moving into the big tank when they are big enough.