One thing to keep in mind when counting slots in your rack and wondering what species to add.....is what are the environmental requirements for the species you want to house with BP's? Will they thrive in the same ambient temps and the same hot spot as the rest of the rack? Will they be ok with that kind of humidity? (although humidity is something you can customize per tub if you're careful)

AND you will want to consider quarantine needs....regardless of species, you don't want to immediately toss a new animal into the same rack with your current collection. Doing so can be risky...especially bringing a boa into a ball python collection.