Grotek Gro-Silic is a concentrated liquid silicon supplement suitable for soilless and hydroponic systems. This plant-available form of silicon helps improve plant growth and quality, in part by hardening cell walls. Plants with improved cell wall structure are better able to endure periods of abiotic stress such as high temperatures and drought. Silica is one of the most interesting supplements to add to a nutrient program. While not considered essential, silica assists numerous plants with abiotic stress. Gro-Silic has elevated levels of plant available silica to help with heat, drought, and salinity, providing improved uptake within plant structures when compared to other slower release forms of silica. Grotek Gro-Silic is a strong base and should never be added to nutrient concentrates. To avoid precipitation of nutrients, it is recommended to add Grotek Gro-Silic to nutrient tank and adjust pH to desired range prior to adding other nutrients. If adding to an existing nutrient solution, pre-dilute in a small amount of water. Check pH and adjust to 5.5 - 6.5 depending on crop requirement. Grotek Gro-Silic Features Compatible With Beneficial Biology Improves Abiotic Stress Resistance Highly Concentrated, Plant Available Silica Grotek Gro-Silic Guaranteed Analysis Boron (B) - 0.009% Derived From: Boric Acid Grotek Gro-Silic Also Contains Non-Plant Food Ingredient: 13% Soluble Silicon (Si) from Sodium Silicate 87.0% Total Other Ingredients (inert as non-plant food ingredient) Grotek Gro-Silic application Rate and Feedchart Application Rate: 1L makes 6667L of solution.