Ok I've got two channel cats that I got from the pet shop close to a year ago. They were maybe two inches long when I got them. I've had them in a 29 gallon tank with 2 goldfish and 3 other fish called guramis (prolly didnt spell that right). They both have grown to about 6 inches long now. My question is: How big will these guys get while in this tank? Will they keep growing or reach a limit to the size of the tank? Does anyone know?