Your setup looks great but it does need a little tweaking.

1. You need two identical, tight fitting hides. One on each side. The water dish can be kept in the middle.

2. Like Joanna said, you'll need a digital Thermometer and Hygrometer to moniter the Humidity and Temperatures. Gauges like that are usually off by a good 10 units.

3. I suggest getting rid of the lamp, BP's don't need them unless your room temperatures are below 75* F. This is most likely the case for your low humidity, as well as the Hygromter gauge (they are usually off by a good 10 units anyway.)

4. You must have a thermostat to regulate your U.T.H or else your snake may get burned. My 10-20 gallon Zoomed U.T.H went to 140* F unregulated when I tested it out. A really cheap one is the Reptitemp 500R, I use it without a problem. (http://www.reptilesupply.com/product.php?products_id=75)


Here is a picture of my setup for my 250 gram male Pastel. It's a 20 gallon Long terrarium with two rock hides (both are the same color now), water dish, foilage, drift wood (for shedding), with aspen as a substrate. 3 walls are insulated with foam board and I use a ZooMed 30-40 Gallon U.T.H regulated by the Repti-Temp 500r Thermostat. I use a National Geographic Digital Thermometer/Hygrometer. ($20 at Walmart)




I hope this helped!