House & Garden Aqua Flakes is the complete base nutrient formulated specifically for recirculating systems. Aqua Flakes A & Aqua Flakes B are ideal for expanded clay, mineral wool, deep water culture (DWC), aeroponics, and other forms of recirculating hydroponic cultivation. The H&G formulation and blending methodology allows for a perfect ratio of combined nutrients to optimize medical-grade cultivation in aerated systems. The result for you? Longer lasting pH stability, consistent nutrient uptake, fast plant growth, and targeted, plant-specific EC levels.