X Nutrients Silica, 5 GallonSilica provides increased levels of potassium and silicon helping to strengthen plant tissue by building stronger cell walls. This helps plants to combat adverse conditions such as heat, drought, frost and from insects. Refer to feeding schedules for amounts and usage. General Specific Usage: Hydroponics Use 5 mL per gallon in your reservoir. Soil Coco Other medium Use 5 mL per gallon everytime you water. Discard any unused mixed nutrients. Notes: