I often wonder myself why the stores do not carry them. I think I'll ask next week when I go get rats. Maybe there is some kind of liability issue I am missing. I understand that when you are selling animals how a tank set-up is more appealing but even that could be sold as a kit correctly. I could even see how tubs could sell. You put everything together for the customer so all they have to do is plug it in. I did ask one time why they did not sell heat tape and they looked at me like I was an alien from outer space and this was in a reptile specialty store.