Update: they're all now moved into the 30 gallon. Darters and sunfish doing great and eating live brine shrimp and frozen bloodworms. Sadly I doubt the chub will make it since his caudal peduncle and caudal fin are all red and he has a wound under his gills close to his heart. Sunfish will have the 30 to itself when it starts to get territorial but by then I should have the darters moved to a 20 tall.