Use approximately 40 grams per wash. Tip: an old protein powder scoop works perfectly for this, weigh it once and you'll always know exactly how much you need. For hard water or a heavily soiled load, add an extra half scoop. Wash at 40 or 60 degrees. An eco program works too, just make sure to let it run the full cycle and avoid the quick wash. For white and light fabrics only, as percarbonate will cause colored textiles to fade after several washes. Not suitable for wool and silk, and never combine with chlorine bleach. Store the container completely dry and tightly sealed.