Description “Magic Blue is a non-toxic litter box filter that absorbs and retains up to 80% of ammonia and reduces fecal odors by an average of 40%, depending on your cat’s diet. Magic Blue absorbs approximately 25times more of the hazardous ammonia gases than activated carbon filter. Unscented and non-toxic. Includes 6 filter pads (for 3 months). Made of BPA-Free Materials. Dogcatto Pet Store”