Prozyme by Humboldt is scientifically proven to penetrate plant cell walls and increase nutrient uptake. Prozyme is highly effective because it a natural chelate, or biological key that accessing plant walls. This biological key also carries over 80 different beneficial enzymes! When these enzymes reach the plant cells, they will break down dead root mass, starches, carbohydrates and nutrients to make them readily available to the plant. Prozyme is the perfect delivery system of the perfect enzymes. You will see the results you have been looking for! Quantity: 2.5 Gallon.