These fizzier are specially formulated fizzing tablets that make cleaning your toilet fun and easy, with the addition of concentrated hydrogen peroxide. Just drop one in the bowl, swish the water around with your wand a little, wait about 5 minutes, then scrub and flush. These freshen the bathroom and leave the toilet sparkling. Regular use eliminates the need to get in there and scrub with a pumice stone. Can also be used to clean sinks, tubs and garbage disposals. Just add water and scrub! Septic system safe, and zero waste!