Well shoot. I guess I'd better go return all of my Animal Plastics EP racks with clear Vision tubs!
Some of mine are in clear Vision tubs (like the above), and some are in solid gray ARS tubs (not pictured). All of my hatchlings are in the clear tubs right out of the gate. Regardless of tub color, if an animal prefers the security that a hide provides, they get it. If not, they don't. Simple as that.
This is off topic, but what program do you use with those QR codes?