Mammoth Silica - 1000 MLMAMMOTH SI was designed to use throughout vegetative and bloom phases of plant growth and is compatible with typical fertilizer regimes. Guaranteed Analysis: Total Nitrogen (N) 0. 1% 0. 1% Nitrate Nitrogen Soluble Potash (K2O).. 0. 5% Calcium (Ca). 0. 1% Also contains non plant food ingredient 0. 5% Soluble Silicon (Si) Instructions for Use For use in hydroponic or continuous liquid feed programs. Apply 0. 5 mL per gallon to the reservoir every 5 7