For years the number one complaint made amongst cat owners has been the bad smells coming from their cat litter box. The amount of ammonia found in cat urine has been a constant issue for cat owners leaving unhealthy toxins in the air and harsh smells. There are many litter and add on items available to the UK market but most of these simply mask the odour rather than removing it. Catit Magic Blue absorbs and retains up to 80% of ammonia, great for purifying the air in your litter box and reducing significantly the foul smells and the risk of ammonia affecting those around you! The Magic Blue Cartridge is a reusable plastic holder that fits every litter box. It has a cat-proof lock and comes with a handy docking station with adhesive sticker.