Aquarium 2.5cm x 1.5cm Air Stone Cylinder Air Bubble Diffuser for Nano Air Pumps, Small Buckets and Aquariums, 10 Pieces

Medium Bubbles: The gray bubble stone cylinders produce large, dense bubbles. This is an excellent way to increase oxygen solubility and promote active aquatic life in your aquarium. Standard inner diameter of the air chamber: 0.4 cm. Powered by a 2W to 4W nano air pump. Suitable for small aquariums and fish tanks. Reliable Material: Made of sand and stone, it has a good structure, high efficiency, and long-term use. It will not affect the health of your lovely fish. Stable and Durable: Each cylinder measures 1.5 cm in diameter x 2.5 cm in height, with a total height of 4 cm and weighs 8 grams. Its cylindrical shape allows it to sink to the bottom of the aquarium and produce regular bubbles. Easy to use: Soak the stone in water for one hour before use. Clean it regularly with a brush as it can become clogged after a few weeks or months of use. Note: All measurements are taken manually. Due to differences in lighting and display settings, please allow for a 1-3 cm error. There may be a slight color difference. Please refer to the actual item received.