Correct me if I'm wrong but it sounds to me like you want to use soil along with your Wilma 16 site drip system???

The Wilma 16 system is a hydroponic system created to be used with soilless mediums such as peat moss, hydroton, coco and so on.... Technically you can use it to water/feed your plants with soil but not to the point of runoff..... The runoff soil particles will likely collect and clog wherever they can.... I think you are better off learning hydro since you already bought the system.... The choice is yours.... BTW, their are plenty of organic hydro nutes that you can use too, if you decide to stick with it....

Hope this helps....

CGI::::::