Advanced Nutrients Root Mass Expanders Tarantula - 23 LAdd beneficial bio fertilizers to your grow and optimize conditions for explosive yields. Tarantula delivers optimal ratios of hand selected bacteria for enriching your gardens root zone. Increases water and nutrient absorption for maximum yields 10,000,000 CFU per gram offers optimal conditions to ramp up nutrient transport Improves availability of much needed iron and phosphorus Tarantula is specially designed for use with diverse hydroponic growing