Bio balls is nice filter media for fish tank, pond and aquarium to enhance the filtration effect and stabilize water quality. Features: Made of plastic material, which has a large surface area. The pond filter media is light in weight and easy to carry, it can be used in seawater or freshwater. Flexible and easy to use, you can add them in canister filter, top filter, fish pond filter or bottom filter etc. Hollow sphere, easy to clean. Internal biochemical sponge, enhance the filtration effect, stabilize water quality. With a mesh bag for easily store and carry. Specifications: Material: Plastic Type: 18pcs/36mm, 50pcs/26mm, 100pcs/16mm (optional) Package Weight: 18pcs/36mm: 180g / 6.35ounces 50pcs/26mm: 130g / 4.59ounces 100pcs/16mm: 100g / 3.53ounces Package Size: 200 * 140 * 50mm / 7.87 * 5.51 * 1.97in Note: Before using bio balls, please soak in the water for 10 minutes to make the item clean. To get the better effect, it’s best to change bio balls every 6 months. Packing List: 50
