Hydrofarm Active Aqua ASCL Air Stone Cylinder

It's been 20 months since I purchased 2 of these stones and they continue to provide an insane amount of bubbles. My usual go to is petsmart for the large disc stones for 11$ but they clog up easy, requiring cleaning/sanding and the air line nip on the stones breaks easily after some time. The two of these stones have never been sanded once as a precaution and the quality of plastic on the nip is of a denser and thicker plastic. Would recommend and buy again.

***I purchased these stones at $1.95 each back in January 2014. In October 2014 they are currently $8.99 each.***I contacted Amazon customer service and they confirmed the new price of $8.99 as legit. $8.99 for a small airstone, how does that many any sense? It doesn't. So I'm reviewing this as 1-star as this price-point makes no sense.Hopefully it will push Amazon to reprice these, since the supplier Hydrofarm still sells them at $1.95 each.Granted these are excellent airstones, but a 300% markup on such a common item is insulting. At that price these would have to have a built-in airpump, lol.

My favorite air stone. The oxygen is amazing, I use it for my plants and they love it. The small one is quite large so I don't need the larger ones. If you are buying for a fish tank, read carefully, the stone is over 1 inch in diameter. If you need oxygen for your plants, they are the way to go. I have a small hydroponic garden for my bunny friend. A few deep water cultures and a few aerogrow gardens, I use the small stones in both (extra oxygen in the aéro garden) the larger stones would not fit in my set up but if you use a 5 gal. bucket, I would go with the large stones

Seems to put out a nice amount of air. the bubbles are medium sized. puts out smaller and more even amounts of bubbles than my other airstones making it a lot quieter and it vibrates a lot less. Overall I'm satisfied but I'll update this review after a few weeks or months,

Installed a week ago, providing excellent Aeration to tertiary septic system via 1300 gph air pump using 3 tubes. Results are impressive and so far economical. Durability is the next test over time.