BUS KLEEN is a BACTERIAL product containing a dye and fragrance, that controls odor and treats the organic waste in BUSES, .. MOTOR HOMES, .. PORTABLE TOILETS, .. BOATS, .. AND CAMP GROUNDS. Add one or two water soluble (30gram)pouches after each dumping of the holding tank and YOU will control odor with the bacteria consuming the organics. YOU will be left with a FRESH FRAGRANCE and EASIER DUMPING.