my tire track started life at my house in a 30 gallon tank, but he was about 3 maybe 4 inches long. He is know in a 90 and I've had him for about 10 months and he is over a foot long now. he will soon be going into a 180. Just giving you a little bit of a time line, since mine grew much faster than I though he would. I feed him every other day and he eats night crawlers, sliver sides, krill, ghost shrimp, just about any frozen food I put into the tank. Also mine will only eat from my hand, it will not eat any food that is just floating around in the tank. Except for the ghost shrimp, he loves chasing them down.