Can't go wrong with either a Hog or a Dumerils.
If fed correctly (ie, not overfed), both will grow slowly. Both should do fine in a 38qt tub if you start with a baby. Both my baby Dum and baby Colombian are in 38qt tubs right now, too, and they are doing great. You'll want a 4x2x1 as a bare minimum for an adult though. A 4x2x2 or larger is even better. Boas will use every inch you give them so you can't go too big (the one exception is that Dums really won't climb. Colombians and Hogs will. So you can get away with a lower, more terrestrial cage for a Dum while you'd want to give a bit of height for a Hog - at least go 2' tall for a Hog).
Personally, I adore the temperament of the Dumerils. As much as I love my Colombians, I highly recommend a Dum as a first boa. They are wonderful snakes and very underrated. They are beautiful too.
Reply With Quote