General Hydroponics has developed two cutting edge root innoculants, SubCulture-M and SubCulutre-B. SubCulture-M is a blend of mycorrhiza that is dusted on roots during transplant. SubCulture-B is a blend of cultured bacteria that can be used in hydroponic reservoirs and in soils. Both products allow your plants to develop a symbiotic relationship with the media and nutrients, and serve to increase your plants immunity to disease and also will promote huge increase in yields.