2000 Flushes Bleach now kills 99.9 percent of bacteria! With a new, concentrated formula, 2000 Flushes Bleach delivers continuous cleaning action for up to 4 months. 2000 Flushes Bleach uses powerful chlorine to bleach away stains to keep your toilet bowl continuously sanitary, stain-free, and deodorized. Freshen your bowl and keep the water crystal clear with every flush.