Actually, I am a science major. Psychology is a science (particularly sense I am focusing on animal behavior), and I am also double majoring in wildlife biology and ecology. They don't let you keep other bugs in labs because it could contaminate the actual experiment, or other materials kept in the lab. If mealworms aren't good for them because of the exoskeleton, then why are crickets ok? They have exoskeleton too. Also, the care sheet for FBTs said that ten gallons was good for three to four frogs, and I have read other sources that have had numbers larger than that. I may not be a math major, but given those numbers it seem as though one FBT should do fine in 5.5gals.