Opie, the add ons I speak of are all kinds of nutes. It's so confusing to many of us what works and what doesn't. If your setup works and you get good yeilds then don't mess with it. I wish I could go co2 now but I can't. No money. LOL. I'm lucky to be where I am now. It's all good in the learning to say what works for you. I don't think you need alot just keep it simple. Wish I had co2. Let us know how it does for you. I'm still waiting for big Z's books. No problems here. Let's keep learning.