The Juwel BioPlus Fine Filter Sponges are primarily used for the biological filtration of your aquarium in the an aerobic zone, making it an essential component of the Juwel aquarium filter system. The fine 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 are made without the use of chemicals, meaning that there is no residue. Juwel BioPlus Fine - Filter Sponge Available Sizes: 88021 Juwel BioPlus Fine ONE - 7.5 x 5 x 5cm 88051 Juwel BioPlus Fine M - 9.5 x 9.5 x 4.5cm 88101 Juwel BioPlus Fine L - 12.5 x 12.5 x 5cm 88151 Juwel BioPlus Fine XL - 15 x 15 x 5cm Optimum biological filtering characteristics Homogeneous structure, guaranteeing even flow conditions No chemical residue Suitable for use in freshwater and saltwater aquariums
