Gugou 4 Inch Air Stone Disc Bubble Diffuser with Suction Cups for Hydroponics Aquarium Fish Tank Pump 2 Packs

Installed in a small tank for a betta along with a cheap bubbler. I noticed as soon as I plugged it in, that all, or most of the bubbles only come out of the top, or corner of the stone when mounted vertically. Maybe my fault, maybe not, just an observation.

These came super fast! They are as advertised and work well. I am using them for a hydroponic grow and they are excellant in that capacity. Do not hesitate, these are what you want.

They work well as air stones for my licensed medical hydroponic system but they don't stay suctioned to the bottom like my other ones. Soak them for 2 hours then run your pump through them for 15 mins then soak again for at least 15 mins then use them for best results on these and most air stones.

The aeration blocks are big and produce a lot of bubbles.

I ordered the 2 pack. For both the air stones released the majority of the air around the edges. Both stones had spots with material missing so the air came out there as well. One of the stones was smooth and the other was very coarse and looks like it will further break down. These are not a very good product and won’t the needs for any use.

Great product as advertised!!!

Great stones for lots of bubbles

This thing is awesome... lots of bubbles

Works well!It depends on the pump you’re using