25 Loads. The Stain Dissolving Power of Wisk with ColorSafe Bleach: Whitens whites and brightens colors; Safely dissolves tough stains. The surfactants and enzymes in Wisk with ColorSafe Bleach are biodegradable. Safe for septic tanks. Wisk with ColorSafe Bleach does not contain chlorine bleach. This Wisk formula was made without phosphorus.