30PCS Black Sandstone Aquarium Oxygen Pump Aeration Air Stone Fish Tank Bubble Stones Accessory

Feature: 1. Adopts sand stone, through high temperature agglomeration, good gas dispersion, good filtering, ozone resistance, corrosion resistance. 2. Can increase oxygen content, reduce carbon dioxide and increase acidity alkalinity can produce water flow. 3. Important tool for maintaining the respiration process of fish in aquarium. 4. The product is durable, reusable and can be washed repeatedly. 5. Can be widely used in a variety of places, perfect accessories for aquarium. Specification: Condition: 100percent Brand New Item Type: Bubble Stone Material: Sand Stone Color: Black Quantity: 30PCS Suitable: Small Fish Tank Weight: Approx. 463g Stone Diameter: Approx. 2.2cm/0.87inch Suitable Hose Inner Diameter: Approx. 4mm/0.16inch Using instructions: 1. Soak in water for 15 minutes before using 2. Remove from the tank and rinse repeatedly if there is fouling and bubbles are reduced during long-term using 3. Airstones can be reused . Package List: 30 x Bubble Stone