For All Fresh & Salt Water Aquariums 3"x8" For All Small Filters Most cost effective way to protect filters from damage caused by loose filter media Specially designed, 100% nylon, drawstring bag maximizes filtration and will not disintegrate in water. For use in all filters and all types of carbons or other granular products Washable and reusable HOW TO USE Fill bag with media, pull drawstrings and place in filter. Protects your filter without reducing your filter performance. Acurel #8031 LOV MEDIA BAG 3X8