Cleans &Deodorizes Safe for plumbing septic systems. safe with any cleaners or bleaches. Directions: 1 Remove toilet tank top. 2 Remove tablet, from package. 3.flush toilet,when water level is low ans valve is closed. drop tablet in tank near the right sidewal ans not near the water inlet. 4, Do not flush again for at least 10 minutes. 5 When color ih the bowl is gone,replace with a new DG EverydayTM Automatic Bowl Cleaner tablet. Cleans and Deodorizes With Every Flush!