20 Pieces Aquarium Bubble Stone, Aquarium Air Stone, Bubble Diffuser Air Stone For Ponds, Fish Tank, Aquarium Air Stone Cylinder Bubble (10pcs Black A The product is shipped based on the color or size of the main image of the product page. Quantity and specification: including 20 x aquarium bubble stone. Suitable for 4mm inner diameter tube, size: 4cm 1.5cm 2.5cm. Made of high quality mineral material, lightweight, due to high temperature shaping and air stones are very easy to wash , you just need to brush them on the surface, they can be repeated. Easy to use: the air stone can continue to supply oxygen to fish and other aquatic animals. Put the stone completely in water 1 hour before use. Clean regularly with a brush because they clog. Powerful functions: the aquarium oxygen stone has a high level of dissolved oxygen and produces even tiny bubbles rather than a limited number of large ones . Widely Used: Suitable for most aquariums, ponds, aquariums, freshwater and saltwater
