Wave Point X-Large Filter Media Bags, Black Extra Coarse Net 3.5mm Hole, Aquarium Mesh Bags with Plastic Zipper, Bags for Bio Balls, Ammonia Remover 17.8" by 13.5" (20 pc)

Package contains: 2 / 6 / 10 / 20 pcs of filter media bags. Filter bag size: 35cm x 45cm (13.5" x 17.8") approx. *** Filter media bags prevent granular filter media from flowing through pumps and pipes. Special designed zipper and mesh cloth for active carbon, Bio-balls, ceramic rings, phosphate removers, and nitrate removers that is good for both fresh water and saltwater. Made from 100% heavy-duty polyester.

• Aquarium Filter Media Bag, Size: Approx. 45 x 35 cm (17.5“ x 13.5“). Mesh: Extra Coarse (3.5 mm hole). Material : Nylon.
• Use in: koi ponds, aquarium fish tanks, canister filters, sumps, and bakki shower filter. Versatile media bags are designed for filtration applications, This bag is good for holding large media items, such as Pellet carbon, bio balls, bio ceramic rings, crushed lava rocks, zeolite, gravel. Not for fine, granulated carbon charcoal media.
• Heavy duty rustproof plastic zipper. The mesh is 100% nylon and completely safe for both fresh and saltwater aquariums. It would not produce harmful substances.
• Keeps bio balls and other large filter media securely in the bag for longevity use. Our pond media bag is constructed of long lasting black mesh and is reinforced with heavy duty stitching to securely hold large biological filtration media for ponds and water gardens.
• This media bags' 3.5mm mesh holes allow water to flow freely through the bag to maximize filtration. Simply place our high-flow mesh bags filled with your choice of media in the path of flowing water.