I am going to move my BP to a 40gallon enclosure soon, so I will have an extra 20gallon tank. I want to get another critter to put in his 20gallon once he moves out, what would you guys and gals reccemmond?

Ive been looking into geckos like the crested gecko, leopard, african fat tails, white spotted, and gargoyle geckos. Maybe a corn snake or a milksnake. What else would you reccemmond? I am going to a reptile show in 2 weeks so im sure they will have lots and lots of critters