【Package】2 Pcs Cylinder Air Stones. 【Parameter】Fits for 3/16"(4 mm）OR 5/16"(8mm) inner diameter tube. Color: Grey. Size: 2"x 2" (H x W). Net Weight: 3.84oz/Pcs, 19.3oz/Package. Specifications: Jetting Volume: 5 L/min, Suitable for 20-40" fish tank 【Feature】Abundant Tiny Bubble: This 2" crazy air stone will create much more abundant cascade of tiny bubbles than you can ever imagine! 【Notice for use】BEFORE USE: You have to soak it in water for about 6 hours before connecting to an Air pump more than 4 W to run it. 【Maintain】Clean regularly by a brush as they get clogged after weeks or months of usage. Safe, Washable & Durable material keeps fish healthy and safe.

➤ Makes Lots of Bubbles

An airstone, whose purpose is to gradually diffuse air into the tank and provide oxygen for fish to breathe, is a necessity to have around your aquarium if you are a lover of aquatic animals. It’s also a must have for Hydroponic and Circulation system. Pawfly air stones are made of high quality mineral material. With high temperature sintering, stones are sturdy and durable, have high dissolved oxygen rate and create even and tiny bubbles rather than a limited number of large ones.

 

➤ What Kind of Airstone Should I Use?

A bigger air stone needs a more powerful pump to produce more bubbles.

Basically bigger air stones can produce more nice bubbles and they're used for powerful air pumps.

If you connect a bigger air stone to a small pump, the bubbles will be produced only at the front of the stone.

Small pumps go well with small air stones while powerful pumps and small stones don’t get along well."

You need an air pump more than 4 W to run this stone.

 

➤ Notes

Please soak the air stone in water for about;hour before first use.

If the air stone doesn't have bubbles in one part, please change the pump of higher power.

After a long-term usage, please clean it if bubbles lessen.