well, that depends on the size of the animals in question, but here's what I can offer in the way of help.
The breeder I'm getting my juvi. GTP from has said to use a tub appx 16" long, 12" wide, and atleast 10" deep. I'm going to be putting either flexwatt or just a regular temp controlled heat pad under HALF of the tub, creating a nice temp gradient. For air, I'll be drilling small holes along the top and bottom of the enclosure. A thermostat with a probe is preferred, as you can read the inside temp without opening the cage and such.
If I messed anything up, somebody fix it...I tried though.
Chris
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0.0.1 Senagel Chameleons-Bud
0.1.0 Red-tail Boas-Xena
1.0.1 Bearded Dragons-Ruff and Alexis
1.0.0 Ball Pythons-Donnie
0.1.0 Carpet Pythons-Lindsey
0.0.1 Savanah Monitors-Izzy