Hunt's Harvest Splash GallonSplash Silica defense the cleanest and most powerful silica on the market. This increases plant structure and nutrient uptake with use in feedings. We are the most affordable and cleanest silica on the market also. In addition, the product has nearly 8x more silica than the most expense products on the markets. It contains nearly 40% of combined silica's and potassium silicates with the addition of borax and molybdenum.