Rack systems are alot different than using a single tank or enclosure. Ball pythons thrive in confined spaces and in this type of rack, the tub itself can act as a large hide so as long as there is enough room for the ball python to move from warm to cool side it is generally ok. I know of keepers that don't even offer hides in rack systems and don't have problems. I also know of several keepers that keep ball pythons in the smaller Freedom Breeder racks which have tubs measuring 9" x 21" x 4" until the ball python is around 600-650 grams. I plan to move smaller bps out of these tubs when they get around 550 grams. She is at 545 grams now so she is about the maximum size ball python that I will ever keep in those tubs. Also, the tubs are not as small as they appear in the picture (the water bowl and hide being close together is kinda an optical illusion). These tubs measure 11" x 17" x 6 3/8"...so they are of decent size. As you can see in the picture below, each tub is rather dark....that is with the lights on in the room and the closet, so that is the most light that they ever get....so they feel nice and secure.