I believe this is correct. I've only had my colony for a few months but I can tell you they can't escape the tub. I literally have them in my living room and they don't smell, make noise or anything. The only way they will smell is if you feed them veggies and leave the veggies in the tub. The only way they escape is if they escape the reptile tank. These things are saving me over $200 per month.

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