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

I am using this air stone in my pond, and wow is it big! This disk took the place to two smaller stones and is a wonderful bubble factory, turning the water over and over. I notice that some of my pond fish swim through the bubbles. It must feel good to them. It's been in the pond for over a month now and it doing great keeping the pond well aerated, which is exactly what I wanted. Nice quality and base.

This has weight unlike some other air stones that end up floating back to the top of a DWC bucket, perfect for Hydro

Works great

There are a nice size and fuel heavy and well-made. But one thing I have to say is that the air bubbles are not coming from the whole stone. Only some the area close to where the air tube comes. Maybe he hasn’t been long enough and the air will start coming from in a few days. But it has yet it hasn’t.

They are great bubblers; perfect size for my 6ft tank. Very durable and quiet... But you can find these significantly more affordable in your local pet store.

Alot of bubbles

I will say this thing is huge and it does add plenty of air HOWEVER it’s supposed to be all fine mist air and it seems the Quality of the seams aren’t great. As you can see in the picture, one side, around the edge must be cracked or something because giant bubbles come out of only that side where the plastic meets the stone. Even if you use the splitter to shut all air off, it will blow those big bubbles out of the broken area. I am disappointed in that but it does do the job. You can clearly see in the picture the side that’s cracked. It ruins the peacefulness of the fine mist.

Works good in 30 feet round pool. Using to grow some fish

Work better than the originals and were a better price

like it

3 of the 4 I bought worked beautifully; the fourth, I had to reseal - the air blew right out at the connection, instead of through the stone. Overall, these air stones are large, but not as effective as others I've had. I bought them to use in Koi pond moving bed bio-filters, and they will suit that purpose well.

this is a great item, i have no serious complaints. works gives bubbles and if you have a sufficiently powerful pump it will give great coverage (at least in a 12" bucket). I am a pretty big fan of VIVOSUN so i was expecting the usual good but not super great build quality that does the job at a reasonable price. You could find slightly cheaper, but I've had such good experiences with VIVOSUN support that id suggest the 2-3 extra bucks is worth the knowledge that you have people that seem to genuinely want to keep you as a customer. Update just great my pepper plant is loving life.

What a junk. It is releasing big bubbles. Lookss like it is broken somewhere inside and escaping air. Lost money on a rocket science description! Stay away from it and keep your money in your pocket! In the background you can see a small one doing the job just fine. It is either defective or just pure crap quality!