Personal experience: I have a 900g bp in a 55gal exo-terra tank. She's a finicky eater and last month she went 6 weeks without eating. So, I moved her to a 20gallon 2 weeks ago. She ate that week. And the week after. So, yeah, I don't know if it's the tank or if it's just "time" for her to eat. But, I really don't see much difference between the 20L and the 55gal since she doesn't ever leave that hide except to move to the other hide. She gets her "stretching" 5 days a week when she gets handled. The kids keep the snakes out for quite a bit at night except after feeding day. We only have 4 snakes, though. When she gets about 1500g, I'll up her to a 30L.