6-Pack Large Air Stones, Humongous 4 x 2 Inch Round Air for Aquarium, Hydroponics, Fish Tank, Koi Pond, Cylinder Bubble Diffuser for Pump, Growing System

Excellent product

Excellent! Would buy again. Very large, good bubbles. Great price!

Heavy, work good

As described

We used the COOMATEC 6-Pack Large Air Stones to help safely transport fish from one pond to another, and they worked perfectly! All of the fish made the trip without any issues. We followed the instructions and soaked the stones beforehand, then connected several stones in each container to ensure proper aeration during transport. The setup was easy, and the stones produced a good, steady stream of bubbles. Excellent quality and very reliable — I would definitely purchase again for future projects. Highly recommend for anyone needing dependable aeration for fish transport or fish tank use!

Two of the six air stones worked. Two didn't have any air bubbles when attached to my air pump and two displayed air just out of the top of the stone. I even tried soaking them overnight. But the porosity (or ability for air to pass through) did not improve.

Great AirStones when used with a high pressure airpump. When they get dirty I just used vinegar and hot water and they're like new again would buy again if necessary

Worth the money