Aquarium Air Stone 4x2 inch 2 Pack, Large Airstone, Aerator Bubble Diffuser, Air Pump Accessories for Aquariums, Hydroponic, Ponds and Fish Tanks

Work good. Have them in my fish pond over winter for 2 years now. Other stones didn't last in our cold minnesota winters

These are great for the aquarium, plenty of bubbles created. Sits on the bottom easily or can be hidden under sand or gravel. Pull them out and clean them once a month for extended use.

These are air stone beasts. They are big solid & heavy and pretty sturdy and they are so much more than I expected. The visuals in the water diffusion is amazing to see and they are ideal for aquariums with fish or live plants/both, and it is also ideal for hydroponics to and there are no problems with them floating off, they stay in place. We are very happy with them and they are excellent quality and I expect them to last a long time as solid and heavy as they are. Happy we found them! *If this review helped you make an informed choice about this product please take a moment to let me know that it is Helpful. Thanks!*

As listed

I use these for DWC hydroponics and they are high quality and work well. I have a 960 GPH air pump so there are very strong bubbles even while being split 6 ways. These are good air stones—I’d recommend them. However, if you’re on a budget: Check out Penn Plax 10 inch air bar for less than $5. The surface area that it releases bubbles on is massive—one of those could replace at least two of these. As I said, these Aquaneat ones are a great product. 5 stars. But since then, I’ve found better value in Penn Plax ($3.49 at the time of typing this). It is worth noting that a 1.5W air pump might not have the same effect as my powerful pump. That goes for both the Aquaneat and Penn Plax. I’m currently using the equivalent of ~6 watts to pump air through each of them and the bubbles are fantastic. I can’t vouch for less air pump wattage, but I’ll test it soon and update this review. Please click “Helpful” if this helped!

I bought them and was a little apprehensive, but, they are doing the job that I wanted done. Yes, I do recommend them, but, don't forget to soak them overnight before you put them in your aquarium. The price was right and I will buy them again, when I need them....

Huge airstones good size

Bubbles come out at the top, seal between plastic tube and stone appears to be of poor quality.

The air stones arrived damaged. I guess these being bulky, they need more than the thin layer of bubble wrap they were sent into. The transport boxes were perforated at the point of their air connector. Out of 6 stones, 3 are broken, i will need to use epoxy to repair them, otherwise they will leak big time and be unuseable. The 3 others have small notches and shards broken off but the nozzle is useable. They look sturdy. They are 1 7/8 inch diameter and 5 15/16 inches long. They are for oxygenating a natural swimming pool on a 5 cfm air pump. Returned. Waiting for refund.