I am really excited about the Plagron Hydro fertilizer. It's cheap and the two liters of A + B were enough for the entire grow. I never had any deficiency symptoms at all and stayed about 20% below the dosage of the fertilizer schedule throughout the entire grow. I had slightly yellow tips for a week and then reduced the EC value slightly. After the first dose of Green Sensation I could really see how the buds were swollen. An absolutely great product. 5 stars for Plagron!!!