The SmartScoop Activated Carbon Filters are powerful odor-absorbing filters that are safe, natural, and non-toxic.
For use in the SmartScoop Self-Scooping Litter Box.
"Smartscoop Litter Box"
Works as described. I have 2 cats and it keeps up with them. I have to empty the tray about twice a week. Does have some grate sticking issues with wet clumps. This site definately had the best price. I like the fact that I can use any clumping litter.