About this item Replacement Specialty Filter Pads 30/50, 3 pack (12 filters total) Ammonia Reducing Pads help to remove excess harmful or toxic ammonia Carbon Pads remove pollutants and organic debris that discolor water, improving water clarity and reducing odor Phosphate Remover Pads help to remove excess phosphate that contribute to algae growth while trapping excess waste, food and other organic debris For optimal performance, replace approximately every 2 to 3 weeks
