12-Pack Large Air Stones, Humongous 4 x 2 Inch Round Filter Aerator Stones for Aquarium, Hydroponics, Fish Tank, Koi Pond, Cylinder Bubble Aerator Diffuser for Pump, Growing System

Additional Details from the Manufacturer

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More features

• -Stable in Water: Each cylinder aerator stones measures 2" D x 4" H and weighs 0.66 lbs. It can easily sink to the bottom and stand stably in your tank for steady bubbles.
• -Fits for 3/ 16 inch standard airline tubing.
• -Recommended a high-output air pump at least 10W or a commercial air pump.If you feel that there are fewer bubbles, you can try using a high-power air pump, which will have a good effect
• -Reliable Material: Made from washable silicon carbide. The material is sturdy , it causes no effect on the health of your aquatics. Help keep fish or roots growing healthily.（ Soak the aerator stones completely in water for 2 hours before use; Clean it regularly with a brush as they get clogged after weeks or months of usage）.
• -Widely Applicable: Fit for hydroponic systems, koi ponds, aquariums or fish tanks, and other systems, helping extend the life of your nutrient solution, keep fish/ roots healthy and promote plant growth.