Yes, that is the device you can hook both your heating and humidity devices up to. The Zoomed Hygrotherm. As for the CHE wattage, it depends on how cold it gets in your area. I tried 60W but it wasn't enough. For a 10g I would recommend trying 100W but double check that the fixture can handle 100W. I believe most can take up to 150W.

With the Reptifogger you want to use distilled water. Regular tap water has too much hard stuff in it that will gunk up the internals (minerals, metals, etc). Not sure on R/O water as I have no experience with R/O, but I assume it will work. Just read the directions to be sure. When you first hook the fogger up be sure to check and see how often it runs. If it's running constantly it will most likely fail quicker and you have too much humidity escaping, but for now worry about getting everything plugged in and fine tuned.