Silica additives contain silicon dioxide in the form of mono silicic acid or potassium silicate. Silica is a vital element that plants use at the cellular level to build up natural plant defences through cell wall development. Most hydroponic base nutrients do not include silica because it is reactive in its pure form. Silica strengthens cells from the inside out producing a structurally stronger plant with superior leaf orientation, and increased rates of chloroform and photosynthesis. Unused silica accumulates in the outer layer (epidermis) of cell walls preventing damage caused by pests and other plant stressors (see All About Silica to learn more).
