I started my retics in ARS-7030 tubs, then moved them to ARS-8018 tubs, then progressed to an ARS boa rack. I'm thinking my 50% dwarf may outgrow the boa rack tub someday but should last another year or two at least. I still have my super dwarf in the ARS-8018 tub but if he wraps a rat I can't close the tub, so I'm looking into getting a couple more levels of the ARS boa rack (ARS-9706). I prefer large tubs over enclosures with sliding glass on the front, I don't have to climb into the enclosure to clean it. And when I feed the snakes I feed from above using gravity to my advantage. Plus the boa rack levels fit right into the other ARS levels so I can get a lot of snakes in a really small space.