Using the power of hypochlorous acid, EZ Bleach™ is effective against a broad spectrum of microorganisms including C. difficile spores, Hepatitis B, and the EPA's List N of antimicrobial products for use against Novel Coronavirus SARS-Cov-2, the cause of COVID-19. Kills 99.999% of germs. The tablets have a 3 year shelf life. Note: 1 tub of approximately 950 (5g) tablets will produce 190 gallons of liquid bleach.