So I have a 1.5" firemouth in a 10 gallon right now hoping to grow him to about 2.5 or 3" before he goes in to the 45 and I move some other fish to a 20, and was wondering if a pair of cory cats would be pushing the limits of the small tank. The firemouth seems to be very calm as I put a neon tetra in his tank just to see what would happen and he completely ignored it, so what do you guys think? Would the corys be okay or should i just completely hold off until he's grown to an appropriate size and transfered?