You might try www.aquariacentral.com for some more info on aquarium projects. I just sold my 125 gallon that at one time had 2 10" channels and 5 5" bluegill in it with no problems. I released them into the pond before they got any larger. Large fish need large aquariums. I raise a couple of the smaller bluegill I catch from my pond every now and then in a 40 gallon breeder tank until they get to the size I like and transfer them to the pond. Good luck.