RAW Silica contains 45% Silicon Dioxide in its formula which is the highest concentration of silicon dioxide that is available to home gardeners. RAW Silica is suspend-able in water and flows naturally to the plant. Since RAW Silica is a natural form of silicon dioxide, it is PH neutral and does not cloud when added to water. RAW Silica can be utilized during all stages of growth and bloom for pristine stem and cell wall strength. It is a highly beneficial supplement to all feeding schedules and works in synchrony with all nutrient and feeding programs.