Precision and Visions are nice...but VERY pricey. Depending on what you want to do with it, you would be fine with either a glass "critter cage" (cheaper than an actual aquarium but looks the same) or a rubbermaid/sterilite setup. I don't know the dimensions of a 40gal long, but I do know it would be big enough for a fully grown bp. You would want to start with something smaller for a baby.