I was a grower many years ago nothing major, feed the habit. Well its time to feed the habit again. Read up on the hydro LOOKED very interesting. LOVE the idea, so I have made a very nice working pvc system. Had 18 growing , 4 had a jump start in some dirt the others had ten good leaves growing, but the 4 were 12" shoots everywhere PRETTY little plants. So away the learning is make sure reservoir is large enough. I had to go on a 9 1/2 hr south for 2 says then return. Well I returned to a heart break all the plants have used up all the water in the reservoir and they were dry a bone. 1 1/4 oz of leaf.