Earthjuice Grow is for N, Earthjuice Bloom is P and Earthjuice Meta K is Potassium. You will probably want to get Earthjuice Microblast for all the micronutrients.... from what ive heard Reverse Osmosis water is the best to use.

If your looking for some good info you should check out "The Grow Report" and "Mr. Bud's Grow Shop" I havent listened to Mr. Buds Grow Shop but Zandor goes into great detail about nutrients in The Grow Report...

GL with your grow im about to start one with like 2 plants, first grow for me.