Silver Formula Safe for Hydro Systems House & Garden® Roots Excelurator Silver for Hydro (1.3-0-0.7) is the most powerful root stimulator available in today's market. It works by forming a membrane around the roots protecting them from harmful bacteria and fungus, providing the perfect conditions for explosive root growth. Not only does it protect against harmful diseases, but it also cures existing root rot. Clean running all types of drain to waste and recirculating hydroponics systems. Including Aeroponics, DWC, or any system that is oxygenated. Contains minerals, natural acids and vitamins. Provides a powerful microb rich forumla without adding thick natural compounds of the Gold Formula. Packaged in a silver aluminum canister to preserve organic ingredients and beneficial biology. Use Roots Excelurator Silver in all hydro type systems during the vegetative and early flowering stages. DOSAGE Apply exactly the same dosage as recommended for Roots Excelurator Gold Mix 1.1 ml to every gallon of water in the nutrient solution. Administer at every feeding during the first two weeks of the rearing cycle. At 1.1 ml/ gallon, this product is the least expensive rooting agent per gallon of feed water on the market! Ingredients: Ammonium nitrate and potassium hydroxide.