Hello Liba if you want to learn about High Brix just punch in high brix gardening into your search engine.A brix reading is done with a refracto meter which measures solids within the liquid sample.Dr. Carey Reams did alot of agricultural research on maximizing nutrient content of food through soil testing and the use of soil augments.Its very complicated but once you get the basic concept one can take it as far as one desires or can afford.Happy reading and sprouts rule.Jeff.