Nutrilife SM-90 is a organic based pest inhibitor, which discourages pest infection, fungus and root rot. The organic composition of SM-90 results in its ability to be bio-degradable and also non-toxic to humans, animals and plants. When you add SM-90 in small quanities to plant nutrient solutions, new root growth emerges. Your plants will develop larger root area, root runs and exhibit generally better root development. A product your garden can't live without! 4 LITER.