Nutrient & fertilizer for home garden plants

by Zalak
(India )

Hi, we are planning to grow up some vegetables like tomatoes, spinach, parsley, lemon in our garden via hydroponic..
We are using coco pit as a medium.

1. Can anyone suggest about which kind of nutrients we can use for it?
2. We are from Ahmedabad, India.. Which companies fertilizer & Nutrient are suitable for hydroponic systems?
3. How frequently or in which kind of quantity we need to use nutrients?
4. Some one has suggested us to use hydrogen peroxide with water during planting.. Is this correct?

Pls suggest..