get the gravel out soon he will be alot happier as long as he can turn around with ease their no rush for tank but his size is still to small for the age what do you feed him? and has that been his only tank?
i was basically guesstimating with the length. and i was not including his tail fin. including the tail fin i would say he is closer to 11 - 11.5 inches. i feed floating food sticks from tetra min. and yup- thats been his only tank.