House & Garden Aqua Flakes is the complete base nutrient formulated specifically for recirculating systems. Aqua Flakes A 0.3-0-0.3 & Aqua Flakes B 0.1-0.3-0.6 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, faster plant growth, and balanced, plant-specific EC levels.