GH Armor SI, 2.5 Gallon from General Hydroponics is a powerful solution for protecting plants from root disease. It is designed to help prevent root rot and Pythium when used as a preventative measure. Armor SI also helps promote vigorous root growth, leading to healthier plants and higher yields. This product is ideal for both soil and hydroponic systems, making it an excellent choice for any indoor garden. Armor SI is also great for use as a foliar spray, giving an extra layer of protection to your plants. With GH Armor SI, 2.5 Gallon, you can give your plants the protection they need to thrive.