Aqua one Aquis advanced 550/750 wool pad 25401w
The Aqua One 401w Wool pads to fits the Aqua One Advance 550 /750 external canister filters. Wool Pads makes superb fine filtration material for aquarium water use as it is capable of trapping the finest particles. Aqua One wool pad inserts are safe for use in all aquariums types including fresh and salt water environments. It cannot be reliably rinsed clean and should be replaced once per 4/6 weeks when your filter is cleaned out.