hey, they are better than crickets! thankfully most the spieces just die if they get out of viv as they need a water source to survive... may want to look into it. i have culture of dubia that im going to give a whirl on (they are flightless, cant crawl up smooth surfaces, and odor is not a problem as long as you dont let the food rot). figure ill feed only the nymphs to the tank just kill off the adults if it gets to large(they can be pretty prolific if given high temps and humidity).