I just wanted to add how I do my water drip system because I have my chameleon in a glass vivarium its not possible to drill a hole for drainage.
So what I did was take a large dog water dish (12in diameter, 4in deep) and a water pump, with some Tupperware that I flipped upside down and fit into the dog bowl. I cut holes for the tubes and hoses in the Tupperware and covered the top with glass/gravel so there is no exposed water for my chameleon or my feeders to down in. I then strung the water tube up to the top of the cage closing off the end but poking some drip holes with a pin. That is the minimum drip system but you will have to change the water often because poop can fall in. So what I did was use a small cottage cheese container which houses the pump with a hole cut in the side so I can slip a fish tank filter in between the pump and the hole so it funnels the water though the filter. Over all its a pretty good system as it filters itself so you don't have to constantly change out the water.