XP-09/11/13 Replacement Biochemical Cotton Sponge Pad Cleaner Filter Cotton for Aquarium External Filter

--Usage: Wash it first, then use it directly into the filter. One pack and two tablets. It is recommended that they be changed once every two weeks.

--This aquarium filter replacement is perfect in workmanship, can perfect replacement for the original replacement.

--This aquarium filter replacement has great filtering effect, can removes debris colors and odors, makes water clean and crystal clear.

--This aquarium filter replacement is quick and easy to install, no tools required, you can do the work easily.