Medium Bubble: Airstone beads produce dense, rich air bubbles. Great way to increase oxygen solubility and active aquatic life in your aquarium Model: ASR-050B; Injection volume: 5L/min; Recommended air pump power: > 4W; Standard Air Hose ID: 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 102 grams. Moderate weight, sinks to the bottom and stays 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 get clogged after weeks or months of use.
