1-5" 15G (24" x 12" x 12") 5"-10" - 50G (36" x 18" x 18") 10"+ - permanent tank/in this case -90g This is just what I has worked for myself ,since the growout tanks I used were pretty small I did large Water changes frequently to dilute nitrates and encourage faster growth.I have no idea about the gb as I have yet to see one over 8" but i've seen plenty of 10"-14" kamfas.