Juwel Fine Compact Sponge

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Fine Filter Sponge The Juwel fine filter sponge is primarily used for the biological filtering of your aquarium, making it an essential component of the Juwel filter system.The fin e pore structure gives a very large surface area, guaranteeing slow and even water flow conditions. This means that it is particularly suitable for biological filtering in the an aerobic area.The open pores of the Juwel filter sponge were made without the use of chemicals, meaning that there is no residue.Suitable for both freshwater and marine aquariums. These pads should be changed out every 9 months (upper) & annually (lower) as this fine filter creates the crystal clear water in your aquarium Show more