Tub looks good, everything about the temps has pretty much been said, just get yourself a thermostat or rheostat at the very least. You want around 60% humidity. Your humidity can be changed by using a larger or smaller water bowl. Also, try using a less absorbent substrate like newspaper to get it down some. (also easier to clean and no risk of ingestion) Ball pythons are from Africa, not the amazon. Enought humidity for a good shed is necessary, but they don't need to be wet. Good looking setup though. He will be a happy snake!