Hydrorock 42 Qt. Soil EnhancerHydrorock 42 Qt. soil enhancer is made from pure organic clay pebbles that help intensify hydroponic growth. Hydrorock will help promote healthy plant growth without the use of soil. The advantage of the organic clay pebble is the light weight structure, durability, and permeability. With this feature it will reduce water usage and keeps hydrated for longer. Use in hydroponic system and can be blend with soil to become a soil enhancer Helps retain up