Introducing the most powerful odor control additive available anywhere today, Ultra MAX! Ultra MAX harnesses the power of a proprietary blend of Human Grade, Dormant Probiotics that immediately begin to consume odor causing organic matter within moments of being introduced to the litter box before environmental bacteria can begin that process causing that awful ammonia 'litter box' smell. In other words, when you stir in the entire 500g bag of Ultra MAX, any 'underperforming' litter becomes the best litter you've ever used for odor control! Ultra MAX is preloaded with a Human Grade blend of 'good bacteria' (Probiotics) that consumes and eliminates the solid particle proteins in cat waste as soon as it's introduced to the litterbox. That means that 'stinky' environmental bacteria, looking for those same proteins are not able to find them, preventing that ammonia odor, before it has a chance to begin.