30+ gallon tank big enough for 2 cornsnakes?

[TGMidnight]

I bought this 30g+ fish tank and the snakes from a co-worker (she said I was going to get the full setup, but I think I was the one was set up. so I gotta go shopping next week for supplies. Luckly its spring here in MI. Bought'em for cheap so not too upset about it.) and I was wondering if this tank is big enough for 2 fully grown female cornsnakes? I'm completely new to snakes/reptiles. Also I was wondering what morphs/paintjob do they have?