hi, I'm new and I do not speak English (I'm Italian) so sorry for grammar mistakes! ahaha lol, still a baby can stay in a terrarium of 18 * 18 inches? I wanted to take a thamnophis sirtalis infernalis, then I'd give fish (Poecilia reticulata alive) twice a week and once a week a mouse? as a commercial heating use (lamp) 30-40 watts .. the terrarium will be furnished with bark and trunks and a tank of water