1 Pack Aquarium Air Stone Cylinder 20cm for Larger Air Pump Air Bubble Diffuser Release Tool for Pond Garden Circulation System

Medium bubbles: With numerous micro-holes that allow abundant, dense and regular microbubbles to flow from the cylinder. Air stone to aerate your water tank. Larger size: Measures 5X 20 cm (D x L). Suitable for large tanks such as ponds, gardens, some large aquariums or DWC systems. Not suitable for small aquariums.Jet volume: 24 L/min; Recommended air pump power: >7W; Standard ID Air Hose: 4 or 8mm. Aquarium aeration dehydrators allow fish and roots to grow healthily. Stable in water: It weighs 454g and is equipped with two square supports at both ends to increase its stability. It always remains stable in water and does not move easily when it bubbles. Easy to use: Soak it completely in water for more than 3 hours before using it. Clean it regularly with a brush, as it becomes clogged after weeks or months of use.