The build a soil will get better and better each run and the foxfarms will either need to be reamended or thrown out/reused outside after 1 run.Ive run both alot but run the coots mix in beds right now.Lights are your big limiting factor,especially the 4 bulb T5,315s or 600 would do you much better(or cobs if your a lotto winner).Agree with brazel about not using a chemical water conditioner,get a small boy to filter water and get the trays off the ground even if it's just a 2" piece of foam from home Depot,you don't want your roots getting cold from the floor,good luck!