Getting Started On this page, you’ll find all the information you need to get started with the Magic Blue cartridge and filter pads. How do I install the Magic Blue cartridge in my cat’s litter box? Insert two filter pads into the holderPut the sticker on the docking station and peel off the remaining paperAttach the docking station to the top of the litter box interiorInsert the holder into the docking station Q&A How long do the Catit Magic Blue filter pads last for? In general, two pads are effective for 1 month, but may last less as long if your cat is on a specific diet or makes excessive use of the litter box. If you notice the smell slowly returning, simply insert two new Magic Blue pads into the cartridge and you’re all set. Are the Catit Magic Blue filters suitable for my cat’s current litter box? Catit Magic Blue works best in hooded litter boxes. We recommend applying the Magic Blue cartridge to the top of your cat’s litter box interior. Is the Catit Magic Blue holder BPA-free? Yes, the Magic Blue cartridge is made of BPA-free materials. I installed Catit Magic Blue, but the litter box still smells? Catit Magic Blue is most effective in hooded litter boxes, combined with sensible litter box hygiene. In short, you will get better results if you scoop and clean the litter box on a regular basis. And when you find the foul odors persist, you may want to try changing your cat’s diet, because what goes in will naturally affect what comes out. You could even try replacing the litter box altogether, as the plastic tends to absorb foul odors over time. I noticed the smell slowly returning. Why is that? Not to worry, this simply means the Catit Magic Blue filter pads need replacing. The pads will keep on absorbing ammonia and foul odors until they’re fully saturated and have reached their limit. In general, two pads are effective for 1 month, but not last as long if your cat is on a specific diet or makes excessive use of the litter box. How can I recycle the used Catit Magic Blue filter pads? Used Magic Blue filter pads are much easier to discard than spray cans used for deodorization. Simply discard the pads in the garbage can. The plastic Magic Blue cartridge can be cleaned and reused over and over again to minimize waste. Are Catit Magic Blue filter pads available separately? Yes, we offer Catit Magic Blue refill pads in packs of 6 (#44306), which last for 3 months.