The title probably seemed a little confusing, but i currently have an empty 20 gal long tank and i was wanting to get another snake for it. I want a colubrid that would be able to live COMFORTABLY in the 20 long as an ADULT. As a baby, ill just divide the cage with cardboard and gradually move it back till i can take it out as the snake gets bigger. I really have no preferences, so lets hear what you guys got.