About This

• Color: Black,Gray; Total Size: 135 mm / 5.3"; Material: Mineral, Plastic; Model: NAJ-301
• Net Weight: 232g; Stone Size: 40 x 80 mm / 1.6" x 3.15" (D*H); Fits for 0.16"/4mm inner diameter tube.
• Increases oxygen and lowers CO2 levels. An important accessory to keep aquatic fish for process.
• Create an abundant small to tiny bubbles rather than a limited number of larger bubbles.
• Suitable for aquarium, fish tank, pond hydroponic and circulation system. Soak it in water for at least 15 minutes before use.