1. Function:When the air pump is working, the aquarium air stone disc will produce lots of dense bubbles, increasing oxygen solubility in your aquarium and enlivening the aquatic lives. It's a must-have aquarium air pump accessories for aquariums.2. Reliable Material: 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 .3. Dimension:small but bubbling enough more with enduring, well-constructed for continually bubbling, and easily be hidden under the water.4. Widely Applicable: the aquarium air stone is friendly to your fish or other aquatic animals, it can keep the roots of fish or aquatic plants growing healthy, suitable for hydroponic systems, ponds, aquarium fish tanks, reservoirs, aquariums, and more5. Maintenance:Soaking the air bubble stone 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin