OASE Filter fleece set BioPlus white

The Filter Fleece Set BioPlus for the BioPlus 50, 100, or 200 includes two fleece replacement filters The combination of coarse and fine filter foams and fleeces allows you to customize to meet the filtration needs of your aquarium. Timing to replace the filter fleece set varies upon aquarium size, number of fish and plants, and declines in filter performance.