mistergreen. Your plan for a 75 gal. tank sounds impressive but way too big for a new BP, especially if you get a hatchling or young one. I'm also not sure what you meant by this: "...but that the same time they may also relate to one another." It sounds like you're thinking about cohabitating more than one BP- but I hope I'm wrong, as it's just not a good idea with nearly all snakes- there's very few exceptions. While snakes can certainly "relate" to one another it's mostly at breeding time- they mostly live solo, & in captivity, where space is far less than in nature- even a 75 gal. tank is not enough to make housing more than one snake a good idea.