coomatec 6-Pack Large Air Stones, Humongous 4 x 2 Inch Air Stone Round Air Filter for Aquarium, Hydroponics, Fish Tank, Pond, Cylinder Bubble Diffuser for Air Pump, Growing System

Brand: coomatec

Color: 6-Pack

Features:

• -Stable in Water: Each cylinder 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.
• -Reliable Material: Made from durable and washable silicon carbide. The material is sturdy and durable, it causes no effect on the health of your aquatics. Help keep fish or roots growing healthily.（ Soak the stone 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, ponds, aquariums or fish tanks, and other systems, helping extend the life of your nutrient solution, keep fish/ roots healthy and promote plant growth.

Package Dimensions: 9.4 x 7.0 x 2.4 inches