You cant go wrong with aquazamp or mist king systems.
+1
Both systems are good, and all the fittings are interchangable.
What kind of cham do you have?
I have found that a rain system works better then the mist nozzles.
With my guyz, they were never drinking from the misting, they actually hated it, and would run for cover.
So, I tried the rain dome. Nice idea, but I didnt like it. It only "rains" in a small patch, so unless the cham just happens to be under it when it goes off, fine, but most of the time, they are not.
I devised my own rain system, I call it the Rain Ring!!
It's installed to the top of the cage on the inside, using small wire ties, and the rain covers the whole area, so when it goes off, they have no choice but to be under it.
They also like the rain drops. They dont run and hide.