i kept a gar for a while, a power head without the air attachment on it is a must. although make sure that he has a place to swim when he wnats to be out of hte current. also, plant the tank with tall plants for him to hide in, as they are very skiddish when they are young. also, nothing under a 40 gallon, even for a baby, you will soon find out that when they are startled or a unknown person to them walks in front of their tank, they will begin to thrash violently in the tank. anyhting smaller than a 40 they will smash into the sides.also keep softer plant lights in your tank, you will find that they are uneasy when bright light is shined on them and they will even back up and try to hide in whatever is available. i hope ive been of some help to you.
Mike