Plant Magic Enzyme improves the health of the root zone with a two-pronged attack: it breaks down dead roots and other organic matter and then turns the material into useable food for your plants. How to use Plant Magic Enzyme can be with any growing medium used at any point during the veg and flower cycle at a rate of 2ml per litre of nutrient solution. Plant Magic Enzyme is perfect if you are going to reuse substrates, as it will help to break down any traces of dead roots from the last grow. Many growers soak their used clay pebbles with enzyme for a few days to eliminate the dead matter. The enzyme is also not susceptible to products for tank cleaning (such as Hydrogen Peroxide).