DWC Bubble Bucket questions for people who have doneit

I have 9 bubble buckets. They are all aerated with 160GPH pumps placed directly into the water. .

1. What kind of water should I use? RO, Aged Tap, Plain Tap etc.

2. I have 5" net pots and I am using the General Hydroponics Flora Micro base line and I add Super Thrive and Cal Mag. I am also adding some Heisenberg Tea made from Ancient Forest, Great White Powder, Molasses and Aqua Shield. I brew it for 2 days in a bucket with air stones and then refrigerate it for up to 7 more days. I add about a cup to each bucket directly at the base of the plant every 2 days. I am seeing some brown roots on one of the plants in the longest root along the middle but then white roots spreading out sideways all along the entire root. My guess is that it is healthy and I am just seeing the benes sticking to the roots. I plan on changing the water every 7 days. Is there any other suppliments I should add? What should I have my PPM's at during veg?

3. How much light should I have? I am using 2 1000 watt lights dimmed to 600 and unless I occasionally shut one of them off, my humidity goes under 50%. Will I be better off with some T8's over them or should I add humidity and light em up with my HID's?

Any other suggestions are appreciated.

I use the Gen Hydro Flora line as well and I use RO/DI water. To me it's so much easier because you start off with 0 PPM and only add what you want in the water. If you decide not to use RO water you will have to use the FloraMicro Hardwater instead of the FloraMicro.

If you have a smart phone I recommend downloading the General Hydroponics Calculator app. It will tell you how much nutes to use for each stage of the plants life and what the PPM should be.