On the nutrient tip, GH has powdered nutrients. Maxi series is powdered. It's way cheaper to buy your nutes dry. I add a trace nutrient every other watering. Saves a lot of money. Also realize that the cloner might have used organic soil. There may be a transition in progress from organics to mineral. Start nutes at 1/4 strength and water until it's pouring out the bottom. I think when sauce said "Cool tubes" he's reffering to the Kelvin. When you heat up a brick of carbon, it begins to glow a deep red. As you heat it up, it slowly gets whiter and whiter. So a low Kelvin number is going to be red. A higher number denotes white, or "Blue".