ok im gonna burst your bubble, soil isa bitch to work with, look at all the plant problems on this forum, most are using soil,yes hydro is less forgiving but its not nearly as much f..king aroung, anyone thats growing needs to take extra cae with maryjane, but hydro is easy, just get a basic 3 bottle system with a ph tester, really thats all you need to do, is make ure to follow the directions to a ''T'', and the nutes are mixed perfect. another thing is that with soil it take longer to see a result from a change whereas hydro can be in hours (good or bad). the whol question is for him to get yield, and i believe this is the easiest est way for a yield increase!!!!