This weekend I am building an enclosure for Jojo. He is getting bigger by the week now and his 90QT Sterilite is getting a bit cramped. I am building it out of 1/2" Aspen board. Its already cut to size at 2'X4' sheets so I am just going to make it 4'x2'x12"(WxLxH).

I am also thinking about putting a removable shelf inside the enclosure figuring that it will give him even more floor space and so i can get him out if he is under it.

I plan on using Water based paint to paint the entire thing black so its nice and dark inside.

My big delima is how to heat such an enclosure? Any suggestions?