American Hydrosoil is an agricultural services company based in Houston, Tx. We offer a specialized Rice Hull Ash. Our RHA is an Amorphous Silica that retains 98% of its weight in moisture, and then releases that moisture into the soil as the soil drys out from its last watering. Our Amorphous Silica RHA is greater than 90% Amorphous Silica and less than 1% Crystalline Silica. This RHA is also a very good adsorbant for industrial consumers, filter additive, makes a highly useful pozzolan in concrete and is commonly used by the steel industry as a tundish cover.