Aquarium Ponds Green Outlet 6 Inch Blue Air Stone Bar 2 Pcs

3 * Air Bubble Stone: 1* Gray & 2* green100% brand new and high quality,Increase oxygen levels, lower CO2 and raise PH.It is an important instrument to successfully keep aquatic fish for respiration process.Durable, washable and sintered by high temperature.Creates bubbles in fish tank while attached to an air pump(air pump is not included).Creates water currents and dazzling underwater scenes.Product Name: Aquarium Air StoneSuitable for: Tank, Aquarium; Shaped: Bar Design; Material: Mineral, PlasticOutlet Connector Diameter: 6mm/ 0.24 inch (max.); Stone Length: 15cm/ 6 inch;Total Size (Approx): 16.2 x 2.1 x 1.3cm/ 6.4 inch x 0.8 inch x 0.5 inch (L*W*T); Color: Gray & greenItem Size: Approx. 40mm * 15mm (D * H)Item Weight: Approx. 103gThis air stone is suitable for using in 30-60cm fish tanks.Suitable for inner diameter 4mm soft tube.Before use, please immerse it in the water for 15 minutes.It it doesn't have bubbles in one part, please change the pump of higher power.It will not work as normal if you attach to the submersible pump.Creates bubbles in fish tank while attached to an air pump.It is an important instrument to successfully keep aquatic fish for respiration process.Used to increase the dissolved O2 level in the aquarium.Package List:3 * Air Bubble StoneOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.