GMSgrowsanswered grow question 2 years ago I used DNF Dutch nutrient formula. Clear nutrients, won't stain the roots. Affordable equal 2 part nutrient for veg and 2 part nutrient for flower. Just a little cal/mg needed along with it. Was made for hydroponics, and is a go to for many large grow ops. Anything will work but clear nutrients keep the roots from being stained and makes it easier to troubleshoot