Fountains also grow bacteria, drown feeders, and serve as toilets for many chameleon species. I hate to be critical, but only filling them once a week? Do they ever get cleaned? Sounds like illness just waiting to happen.For a watering system I use those little fountains with water cascading down (from Bed,Bath and Beyond about $25.00 a piece) and the chams all LOVE them. It sounds nice and they seem to love the flowing water. And you only have to fill it once a week!!! All the lights and water fountains are on times of couse! Works great!