None of this is original. I have borrowed from alot of people who are much smarter than I. I am growing outside in So cal in a cement mixing tray ($5) from home depot. The water level is 1 1/2" deep. I have lava rocks in it to house beneficial bacteria. Inside the tray is a fountain/pond pump 130gph ($30). The pump runs 24/7. It's quiet. I have not changed the nutrients, just added to it. I started the swc Dec 15. I'm growing tomato since it is similar to mj. I did not use any rooting hormone. I cut the clone Dec 27. I did not trim large leaves. I stuck it in a slice of pool noodle ($.97)and let it float in the swc. In about 9 days I began to see bumps. This is a picture of the roots today, 4 days later. The plant never wilted and there are just now signs of nitrogen deficency in the large bottom leaves.