Well, I love my rack, and really never planned on keeping any snakes in tanks ever again. But space issues have made it necessary for me to keep one of my males in a 20g-long tank. My 07 female outgrew her little shoebox tub and needed a space in the rack (in a smaller tub than the 41-qts; two to a shelf with another subadult in the other tub.), so a little moving-around was needed, though my gravid females stayed put in their spots. Can't wait to get a tub for him though! Tanks are not my thing; but the male does not seem to really mind.