Well, I think that if I used two water valves and two additional timers, I could get it to work. Basically, I would have to install valves on each of the two lines and then have the timers open and close the valves before and after each timed misting session. So, when it was time to mist the leaf chameleon enclosures, the valve to the panther enclosures would be closed, and the one to the leaf chameleons would open. I am sure that there are smaller water valves out there somewhere? I have used the lawn ones on misting systems before, and could again, but they are big and require adapters to go to the smaller line size. Maybe Pro Mist has some easier solutions for this.