Medium Bubble: Airstone beads produce dense, rich air bubbles. A great way to increase oxygen solubility and active aquatic life in your aquarium. Model: ASB050; Injection volume: 5L/min; Recommended air pump power: > 4W; Standard ID Air Hose: 0.5cm or 0.9cm. Well-built and efficient long-term service. Reliable Material: Made of mineral material and sintered at high temperature. Ideal for aeration in aquariums, DWC systems or ponds. keep fish or roots healthy Stable in water: each ball is 5 cm in diameter and weighs 106 grams. Moderate weight, sinks to the bottom and sits securely in your tank for stable air bubbles. EASY TO USE: Carefully soak the stone in water for 1 hour before use. Use a brush to clean it regularly as it can become clogged after weeks or months of use. Box contents: 4 bubble diffusers, spherical, metal nozzle, diameter 5 cm
