Whoa it sounds like you should have been here around last august asking about T-stats.

I use spider robotics herp-stat II, not a cheep unit but IMO the best. If you only have the one snake I think a herp-stat I is around a hundred buck. If your wanting to go a more cost effective route I think they have rheostats (dimmer switch, like for a lightbulb) at any hardware store formless than 5 bucks.

It is very dangerous for a snake to have unregulated temps as they can get burned very badly.

Mike