Review on Premium Activated Carbon for Aquariums - MarineLand Diamond Media, 40-Ounce (PA0373) by Gerald Mcrae

I bought this to add to kitty litter as other reviewers recommended using it for odor absorption. In fact, I believe it absorbs odors and I don't even have to mix too much for it to work. Note, however, that this makes things a bit black and dirty because the cats are chasing him outside the box, along with all the debris stuck to their paws. The white tiles in the bathroom need special care and my white footed kitty now has slightly black charcoal paws (my other cat is black so I can't see his paws). It is not harmful to them (I know people who take charcoal internally for digestion and some use it to brush their teeth). Cleaning isn't that important, but I think it's worth mentioning for anyone who loves cleanliness or owns white furniture. When that canister is empty I can try forgoing it and see if the filler I use absorbs odors enough without charcoal. If it works just as well without it, I probably won't buy it again, just for the cleaning.