Botanicare Clearex 1 QuartIn Store Location: C5 Botanicare Clearex, qt Botanicare Clearex is a scientifically formulated isotonic drench solution that works by binding with excess nutrient salts and safely leaching them from growing media. Clearex creates a safe osmotic environment, preventing problems often caused by other leaching methods. Recommended for use in hydroponic systems and container gardens.