crappy chemicals are bacteria and enzyme solution that digest organic waste. use in septic tanks rv holding tanks boat holding tanks grease traps recreational vehicle drains household drains. pet odor eliminator will destroy the cause of odor form vomit urine blood poop feces shit mildew and mold. these bacteria work by bioremediation or waste digestion. they are like giving vitamins to your household drain system. they keep the drains healthy running full volume and odor free