High-Perfromance Base Nutrient - Ideal for Hydroponic Grow Systems Hydro A&B is a potent and highly concentrated mineral-based fertiliser that performs brilliantly right the way through the grow and bloom stages. It's extremely easy to use and offers truly incredible performance, especially when it's combined with Plagron additives. The trace minerals contained in Hydro A&B are all in chelated forms that plants can uptake easily, preventing deficiencies. Hydro A is rich in calcium which strengthens cell walls and fights off heat stress. Hydro B contains magnesium, a vital component in the production of chlorophyll. Adequate magnesium boosts rates of photosynthesis, for faster growth rates and all-round stronger plants. Hydro A&B can be used in pretty much any hydroponic system or inert growing medium, whether you're using run to waste systems, deep water culture bubblers (DWC), flood and drains or NFTs. Visit the Plagron Nutrients category to see the complete range.