Hi guys, so while I was cleaning out my aristocrat, I notcied one of the fans wasn't moving.. I want to replace it, but not being too savvy on the parts, are these just normal computer fans like the type I can cannibalize from an old PC? Also, I was thinking of putting another computer fan in, but I don't see an expansion slot in the Set 'N Forget. Any idea how else I could expand the number of fans in my aristo? Right now there are three plugs inside the aristo.. one going to the hygrometer, one going to the set n forget, and one going to a fan..