Thanks! I'll put the 500-600g BPs in 28qts for now, and re-configure things when I get the new rack. You're right about the individual snake's personality being a factor, especially when dealing with different kinds of snakes. My corns are long and thin, but much more active than a BP, so they appreciate more room... and while Nerissa the BP is pretty big, I noticed she was a bit overwhelmed in the 41qt (I moved her to a 32qt).