features: The new organic balls with a larger bacteria growing area. 15 * The size of 16 mm, 100pcs organic balls included. Increase dissolved oxygen levels and improve biological filtration. Ideal for aquarium, aquariums, koi carp pools, wastewater systems, etc. Characteristics: Color blue Material: PVC Quantity: 100pcs Size: 15 * 16mm / 0.59 * 0.63in Weight: 1g (1pc) Package size: approx. 17 * 12 * 3cm Package Weight: 114g List of packages: 100 * Bio Balls
