FUNCTION - The aquarium air stone bar will produce lots of dense bubbles and increase oxygen levels in your fish tank when the air pump is working, promoting a healthy and thriving ecosystem for your fish. LONG-LASTING PERFORMANCE - Air stones for aquariums are used in the mineral material via sintered with a high temperature, safe and reliable, and won't affect the fish or roots growing healthily at all. APPLICATION - The jetting volume of this 4-inch aquarium bubbler stone bar is 1.3 L / min, recommended air pump power: > 2.5 W, standard ID airline tubing, 3/16 inch, fit for fish tanks, aquariums, small ponds, hydroponic systems, and DWC systems of small gardens. DIMENSION - The measure of the aquarium air bubbler stone for fish tank is 4"/10"/12"(can choose). Its cuboid shape can form a rectangle bubble wallin the tank, enhancing the diffusion of air bubbles in the aquarium. MAINTENANCE - Soaking the air stones for fish tank in water completely for 1 to 2 hours before use. About per 2 weeks Clean the stone surface one time with a brush as it gets clogged after weeks or months of usage by the precipitate of aquarium water. Make the bubble diffuser keep producing lots of bubbles and extend its life, thus saving money for you. Packing list: 5 pieces aquarium fish tank decoration air strips stone sand strips