Review on 2-Pack Nature's Miracle Universal Charcoal Filters with Advanced Odor Control by Lora Schnabel

I bought this carbon filter for my two kittens shared litter box in the hope that I'll notice a reduction in the smell from our bathroom (where we keep their litter box). would. We clean her box every night but we needed extra odor protection when we have guests and such. We have a Nature's Miracle Advance oval bowl with a square filter hole. These filters require us to cut or bend a small part (several inches) to fit the filter into the slot. No problem. However, I'm not sure if I really notice a difference in smell. It might help a little with smelly urine, but not with bowel movements. I walk past the bathroom and smell him. I've bought a lot of these filters so I'll keep using them until they run out, but I'm not sure I'll order them again in the future.