GMSgrowsanswered grow question 2 years ago If you use DNF Dutch nutrient formula and a little cal/mg., keep the ec and ph at the proper levels then that is sufficient for a great grow. Really, proper ph and ec levels then any nutrients should be sufficient. For proper ec, ppm levels and ph for different times in their lives can be found in some of my soiless diaries. Some have detailed feed and ph from birth to finish. Soulless is another form of hydroponics