What can fit?

Hi I have a 10 gallon tank that is empty (not that i need anything in it but....)
I have done a lot of searching online for what i can house in it that can eat mice. But all i seem to get is geckos and anoles, I didnt know if maybe anyone here might have an idea that wasnt online, preferably something that can stay in that size tank for the rest of its life. I was thinking a corn snake but i read they need at least a 20.

I dont like spiders, i have had a gecko, and i have a bp.

Also I would prefer something that wont feel the need to deficate on me as i know some snakes tend to do that. Any ideas are very welcome :)

Kenyan Sand Boa

Would I be limited as to male or female or would either be ok?

A neonate Kenyan will fit in a 10 gal, but it will outgrow that tank after a few years. What about frogs? Maybe a few fish, I know an aquarium used for fish. A strange idea.:O

Jim Smith