Facts about corn snakes?
 They're fast growing, during the first 3-4 yrs. In fact, they never stop growing. But once they reach an average of 5' their growth slows down to the point that it's not obvious. So typically they may start out in a 10 gal aquarium. But eventually they'll need a 20 gal aquarium. And if they're going to be bred, then they'd most likely prefer a 30 gal aquarium. But their babies and their mates should have their own aquaria. For corn snakes don't like to share space, even with other corn snakes no matter if they be family.  They're picky about an environmental air temperature rangin from 70-75 degrees F at one end of the aquarium to 80-85 degrees F at the other. The safest options for reaching that temperature are by heating bulbs, or undertank heating pads. Out in nature, they may be seen sunning on different ground surfaces. In the aquarium, heated rocks tend to burn them.  They're picky about being handled. They may choose to throw up if they decide they're being picked up and touched other than for their aquarium to be cleaned, or their bottom covering to be changed.  They're picky about being on display. So the aquarium should have a place they can fit into, and be totally out of view. And they'll need that hiding place if they're bred, for laying eggs. They tend to lay 12-24 eggs, within a month of mating. And those eggs tend to hatch in about 10 wks.  They're picky about their drink and food. They want their water clean, and regularly changed. And they like their food, once a week and the same size around as they are. They don't need to eat living things. They can be counted on to squeeze and swallow already dead critters.  They're picky about what covers the bottom of an aquarium. Covering such as cedar shavings or corn cob bedding can cause breathing problems, and dehydration and blockage, respectively. So they prefer butcher paper, paper towels, or reptile bark.  They know how to climb, and squeeze through tight spaces. And, in nature, they've been known to chase prey up and down trees, and in and out of what looks like too small holes. So their aquarium should have well-fitting and tightly-sealed tops.  In nature, they may live 10-15 years. They may add another 8-13 yrs in captivity.  By their coloring, they're mistaken for copperheads.  By their defensive/offensive behavior, they're mistaken for rattlesnakes .