if you really want to get 2 hatchlings divide the tank now, before getting the corns,
a couple of other tips, use indoor/outdoor digital temp guages to monitor temps in the viv as the ones that stick on the sides/back of the tank are not very accurate, you also want to measure the temperature on the substrate(if heating with a light) or under the substrate(if heating using a heat mat) not in the middle/top portion of the tank as your snake is not up there.
make sure the tank is escape proof, including the divider if you decide to divide and buy 2 corns, baby corns are MORE likely to have problems while being housed together then 2 adults(adults are less likely to eat/kill a similar sized cage mate).
although you would need to get a second good sized viv in the future as i think 1/2 a 55 gal would be fairly small for an adult corn.
so it would probably be easier just to get a second viv now and give both vivs lots of hides etc.
a couple of other tips, use indoor/outdoor digital temp guages to monitor temps in the viv as the ones that stick on the sides/back of the tank are not very accurate, you also want to measure the temperature on the substrate(if heating with a light) or under the substrate(if heating using a heat mat) not in the middle/top portion of the tank as your snake is not up there.
make sure the tank is escape proof, including the divider if you decide to divide and buy 2 corns, baby corns are MORE likely to have problems while being housed together then 2 adults(adults are less likely to eat/kill a similar sized cage mate).
although you would need to get a second good sized viv in the future as i think 1/2 a 55 gal would be fairly small for an adult corn.
so it would probably be easier just to get a second viv now and give both vivs lots of hides etc.