I got a proexotic tempgun for my snakes. It was probably the best purchase I've ever made. Rather than trying to adjust the temps with horribly inaccurate thermometers, the tempgun made it very easy. with frogs it's not as big of a deal because they actually prefer room temperature, but I still think that a tempgun is a necessity if you're into herps. Plus the proexotic tempguns are pretty cheap.