Air Stone 2Pcs 4 X 2 Inch Large Air Stone For Aquarium, Fish Tank And Hydroponics Air Pump

Fine Bubbles: The air stone produces lots of dense fine bubbles; A great way to oxygenate your hydroponic growing systems ponds aquariums and enliven the aquatic life Size: 4 x 2 x 2; Recommended air pump power: > 4 W; Standard ID airline tubing: 0.16 / 4 mm Durable Material: Made of mineral material and sintered at a high temperature; The material is sturdy and durable which is safe to your fish Easy to Use: Soak the stone completely in water for 2 hour before use; Clean it regularly with a brush as they get clogged after weeks or months of usage Widely applicable: Fit for hydroponic systems ponds aquariums or fish tanks and other systems