The JUWEL fine filter sponge is primarily used for the biological filtration of your aquarium, making it an essential component of the JUWEL filter system.
The fine pore structure provides a very large surface area, which guarantees slow and even water flow conditions. This means that it is particularly suitable for biological filtration in the aerobic range.
The open pores of the JUWEL filter sponge are manufactured without the use of chemicals, which means there are no residues.
