Advanced Nutrients' Sensizym is a super concentrate of over 80 different enzymes, each having specific functions that enhance plant and root growth. (Competitors use only a small amount of enzymes, 12 or less.) Enzymes can do in seconds and minutes what would take normal plant-functions days and weeks to accomplish. Sensizym breaks down dead root mass, starches, carbohydrates and nutrients. This accelerates plant growth as well as assists beneficial bacteria growth. Some Sensizym enzymes help to catalyze water and assist the transfer of water elements to specific sites. Other enzymes speed up the regulatory process within the plant. Still other enzymes help in cell replication. Advanced Nutrients conducted extensive research to develop an enzyme product that has a stable shelf life (18 months). When analyzed, several competitors' products had totally inactive enzymes due to their very short shelf life. Enzymes are measured in units of activity. Sensizym has three times the units of activity as the nearest competitor. All competitors' enzyme products are made for breaking down dead root material. Sensizym does this as well, but it also provides enzymes that are a catalyst for total plant and root development. Dosage: 2 mL per liter.