Nah, don't. I should have specified. And yeah, a 6-8 month old would feel exposed and lost in a huge tank like yours. They should probably be around a year old or so before they move into a bigger tank, and then it should be longer and wider than it is tall. 12" high is just right for a ball python, since these guys are ground dwellers and don't really climb (though try telling that to my little girl).

UTH's don't have controls attached, sadly. You have to get a separate rheostat, dimmer, or preferably a thermostat. Oh, and toss the fish thermometers ASAP! Those things are meant to measure water temps! And mercury meters aren't accurate enough. Get yourself a digital, like the Acurite from WalMart and Lowes, that reads in and out and also make sure you have a good digital hygrometer as well to determine humidity...which is also important.

Great places to get snake supplies online would be ReptileBasics.com, Reptilesupply.com, and Herpsupplies.com. Rich at Reptile Basics is the greatest guy, and you can get a t-stat from him for about $75 fully wired and ready to go.

Oh, and 1 gallon is about 4 liters. Hope that helps.