Check this out...H2 and F1 both in the same bottle together!! Grandma Enggy's H-2 and F-1 are 2 revolutionary nutrient supplements that are derived from a compound called Leonardite. Advanced Nutrients has now combined Fulvic and Humic acids into a single nutrient formula designed to fit the needs of the plants we grow. Ancient Earth reduces the effects of salinity and pH fluctuations, increases your plants' uptake of the precious micronutrients that drive your plants to reach their optimal yield. 2 products for the price of 1. Plus, you get double the value, because this one formula replaces 2 products previously sold separately, saving you money!!!