Review on Pawfly Stone Bubbler Aquarium Hydroponics by Fatima Garcia

I have ordered these stones several times. These air stones are a good size and weight, with a nice chrome connector. They stay in an aquarium or pond with no problem (unlike many other smaller rocks). many small bubbles. Albeit not consistently. There are some variations. Try 4 balls and one will be coarser and the other very thin. The reason I don't give them 5 stars is they still only last about 2 years because the area where the plug is glued in will break, just loosen/pull off the stone if you move them or them lift for cleaning. Stone material adhering to the adhesive simply breaks off by itself. I didn't try to fix them, just ordered a new set. 6-7 dollars per stone. Meaning is hard to say yes/no. But they were the best Airstones I've tried so far and with the convenience of AMZ I just re-order as needed.