VIVOSUN Air Stone 2PCS 4 x 2 Inch Large Air Stone for Aquarium, Fish Tank and Hydroponics Air Pump

These work great. I get 10 million bubbles in my buckets. More oxygen for the plants. Very cool. Not much noise and I didn’t detect any odors.

Air stones work great. I only needed one for my 140 gallon tank. They are very quiet. For the price it is very good quality.

Works great

These are tough airstones. I am amazed that they still work at all after the beating they took in shipping. Bashed so hard, they were knocked free of the factory cardboard packaging. Some chips were knocked loose. Amazon put these heavy, brittle stones in an oversized, non-padded plain manila envelope. That's no way to treat airstones. Isn't Amazon supposed to be in the shipping business? Fail.

Those bubbles work wonderful in fish tank .

These came in today and went right to mypond. Put them in and immediately saw tons of bubbles and was more than happy. Not sure why some bad reviews but definitely well spent!

there's not much to say, they do the thing. These are a nice size for a small fountain/koi pond and and a decent air pump. I used these to aerate the corners of my pond that the waterfall doesn't churn up enough. Good amount of airflow through the stones means less work on your pump.

I've been using these for quite a while I purchased them several times they're nice price so you can change them out pretty often thanks