Bio Balls Filter Media - 1.5 Inch Large Bio Ball for Pond Filter - Perfect Bio Balls for Pond Filter Media – Made in The USA Made in the USA, our 1.5" Bio Balls Filter Media are engineered with precise spines to create almost 2 square feet of surface area. This unique design creates a massive colonizing area for beneficial bacteria to break down hazardous organic waste. Our Bio balls are 100% polypropylene making them a safe and reliable filter media for freshwater and saltwater, offering superior filtration to lava rock. With their uniquely spaced spines, most debris passes through and they never need cleaning. Highly durable and lightweight, these bio balls can be used loose or in our mesh bag with plastic zipper for superior filtration and trusted reliability.

  1 Piece Mesh Filter Media Bag for Aquarium Biological Filtration DURABLE AND LONG-LASTING: Our 5,000-micron 14 inch x 20 inch 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.  OPTIMAL FLOW: This media bags' 1/8 inch 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. EASY TO CLEAN: Our sturdy mesh bags make it easy to remove bio balls or other filter media from your pond for easy cleaning. SECURE BAG CLOSURE: The rustproof all plastic zipper keeps bio balls and other large filter media securely in the bag. RISK FREE! Does this come with a money back guarantee? YES! Your purchase comes with a full 90 day no-risk, no-nonsense 100% Money Back Guarantee. Either you're thrilled, or we don't want your money! 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. Works perfectly to hold 100 - 1.5 inch Large Aquatic Experts Bio Balls. This media bags' 1/8-inch 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. The rustproof all-plastic zipper keeps bio balls and other large filter media securely in the bag.   FREQUENTLY ASKED QUESTIONS FOR BIO BALL MESH BAG:Q: What is the size of the mesh?A: The mesh is approximately 1/4 inch. It allows high water flow without trapping junk and debris. Q: Can the bag be used in an outdoor pond?A: We had ponds in mind with this bag! The tough nylon holds up to outdoor use. It is perfect for either ponds or large aquarium sumps or wet/dry filters. Q: What media will it hold? A: The Bio ball mesh bag is meant for large bio balls. It can also be used with lava rock. For chemical media, choose one of our Fine or Extra Fine mesh bags. Q: How does the bag close?A: The bags have a plastic zipper that closes the bag without any danger of rusting or leaching into the water.