this wee guy was born on april 16th, so over 15 weeks old. his brothers and sisters have been back in their main tank for about a month now. they are all what i would consider an adolescent size and doing well in the tank. this little one lasted only a day in that tank before i put him back in the nursery. s/he is the smallest by far, always was.
i havent seen noticeable growth in a month

it eats, comes to the surface when i feed them. ive also seen it spend time sitting at the bottom.
is there anything i can do to help it grow?