my little guy has grown ridiculously, went from 3 to 5-6" in 1 month. he eats diff kinds of raw fish meat 6 days a week. im still trying to get him to eat pellets. hes stubborn, i starved him for 1 week of that month trying to get him to eat pellets, and he still grew 2-3" that month. currently in a 20 gal, with a cascade 200 filter thats for up to 50 gal, but it has a hard time keeping up with the bio-load, but i keep the water changed and hes soon to be relocated either to the 55 or the 90.