My 5 are only 1" and have been in the tank around a week, I have only just started to see them out and about at feeding times. No idea how long they will take to become adults but if they end up looking as nice as those I will be more than happy.
Beautiful shots Dan! Inspired by these I have just taken some pics of the 3 petricola in my newly set up ocellatus/petricola tank. With my camera and photography skills I won't get results like these but good enough for the record maybe.