Aptus Regulator — High-Concentration Silicic AcidAptus Regulator High Concentration Silicic Acid Plant Supplement One of the most concentrated silicic acid formulations on the market, Aptus Regulator at 1: 6666 dilution delivers usable silicon directly to the plant. Silicon builds stronger cell walls, boosts chlorophyll levels, and makes plants far more resistant to heat, water and salt stress plus pests and disease. A quiet secret weapon in many top tier grow rooms. Why growers choose Aptus