This is 25 grams of the pure material used at 1g/m2. The first ever below "pure" 150 micron water crystals, a special food grade, 100% biodegradable formula of a Linear Anionic Polyacrylamide certified and regulated by WHO UK EA and EU regulations.
This package is not mixed and requires a precise application.
Better than prior crystals due to smaller size like a powder making for full instant activation (Non gloopy).
Increases nutrient retention and reduces watering requirements.