HFS _R 2PCS Air Stone 4 X 2 Inch Large Air Stone Cylinder for Aquarium and Hydroponics Air Pump

[MATERIAL]: Made of silicon carbide [SPECIFICATION PARAMETERS]:4*2*2inch; Pump power: 4-8W, size 5 * 10cm, flow rate 2.5L / min, suitable for 4mm inner diameter pipe;2 PCS package [BUBBLE UNIFORMITY]: The air is evenly distributed in the whole stone area to make the bubble size uniform, which is conducive to animals and plants to absorb oxygen. Bubbles size between 300-500 microns. [APPLICATION]: It is mainly used to provide water circulation in aquariums and ponds to increase oxygen in water, which is very important for the health of animals and plants. [ATTENTION]: Before use, put the aeroliths in water for 5 minutes, connect it firmly to the trachea and place it horizontally in the aquarium. Cleaning the air stone surface often will increase its lifespan. If not used for a long time; clean it and keep it dry in the shade