I'm having 12 clones vegging in a 3x3 tray ebb & flow hydroponic system (4 Sno Cap, 8 c4). I've got them under a 1000w MH lamp in a Hydrohut. I was planning on topping them because I can only let the plants grow to about 3 feet in height. I want the plants to be big, so I figure topping is the...