Product Review

A great way to properly aerate a home aquarium, help to keep fish healthy and add beauty to aquariums. 
Made of mineral material, This Aquarium Tank Air Stone will be ideal for delivering high amounts of oxygen into a pond or fish tank. 
The MODEL ASB-100 air stone is 4" in diameter by 2.4" height. Net Weight: 0.8 lb / 360 g.

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Usage:
Please soak the air stones in water for >6 hours before usage.
If the air stone doesn't have bubbles in one part, please change a more powerful pump.
After a long-term use, clean your stone regularly so that it will be most effective. 
Replacing the air stones every six months as they get clogged with dust, bacteria, and algae.