To the Pacman owner's who keep their frogs in racks...

1) What size tub do you recommend for adult pacman frogs?

I'm looking into purchasing a number of racks for the long haul, but I'm stumped on bin size. 32 QT seems too much. 6 QT seems adequate for rearing young'ins. I'm leaning towards 12-13.5QT's, but they still seem a little on the small end.

13.5 QT Modular Box MCB -S - IRIS USA Inc - storage and organization products home

16.14 x 10.62 x 5.90 <--- Outside bin dimensions, inside bin dimensions I assume are smaller.

Any advice?

Thanks