http://shop.ebay.com/?_from=R40&_trksid=p3907.m38.l1313&_nkw=nutramist&_sacat=See-All-Categories look here for ultrasonic foggers. Nutramist is the only company i know of that makes foggers designed specifically for hydro gardening. thay have teflon heads instead of ceramic. so nutrients don't build up and clog your fogger