Tanlin Drops is a highly effective solution for every gardener growing any type of plant in any type of system. Extremely concentrated – 1 ml makes 100 liters. One 20 ml bottle makes 2000 liters. Safe to use with any nutrient regiment. Will not affect beneficial microorganisms. Non-toxic and completely inert; does not interact with the plant in any way. Tanlin Drops, like all other CX Horticulture products, is designed specifically for consumable crops. Tanlin Drops is plant, pet and people safe.