Simple Deluxe 602 GPH Air Pump 18W 38L/min 6 Adjustable Air Flow Outlets with 25 Feet Airline Tubing for Aquarium, Pond, Hydroponics Systems, Silver

Replace the stone after it stops working properly. Environmental Material & Oxygen Supplement> Air stones are a great tool to add oxygen and circulate added nutrition to your

• Size: 4" X 2" X 2". Fits for 4mm inner diameter tube.
• Widely applicable: Suitable for hydroponic systems, ponds, aquarium fish tanks, helping extend the life of your nutrient solution, keep fish/ roots healthy and promote plant growth.
• Quality and safe materials: Made of safe and washable material -Silicon carbide, non-toxic materials are safe for your fish. (Soak the stone completely in water about 1 hour before use.)
• Features: High-temperature sintering, the air stones for aquariums are sturdy, durable and washable. The dissolved oxygen rate is high, producing uniform and tiny bubbles. Increase oxygen and reduce carbon dioxide levels.
• Tip: Air stones need to be replaced every few months because they are blocked by dust, bacteria and algae. Clean regularly by a brush.