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GT Silica is a concentrated mixture of silicic acid and potassium hydroxide. This is often referred to as potassium
silicate. Its purpose is to add silicon to hydroponic nutrient solutions. Silicon is a beneficial plant nutrient found in
virtually all soils but not, until now, in hydroponic nutrient solutions. Silicon will strengthen plant cell walls and become
a barrier against water loss, fungal infection, particularly mildews, and insect and mite attack.
Silicates are very alkaline and care must be taken with its use. Always check the pH after silicon has been added to the


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