Hello! I have seen the product "Horta-Sorb® SM 4 lb. Bag" in DIEHARD™ Mycorrhizal Inoculants and Horta-Sorb® Super Absorbent Water Management Gels and thought of you. You can get more details about it on the following address: http://www.horticulturalalliance.com/details.asp?ProdId=HSSM4&cat=1028&path=1002,1028