VANZUQUE 10CM Fish Tank Aquarium Air Stone,Ceramic Air Stone Diffusers Deep Dissolving Oxygen Air Pump Accessories Fish Aquatic Pet

Nice unit that looks good in the tank and distributes a good flow of bubbles.

I linked this into the two outlet tubes from my great TETRA 500 pump, with a simple plastic valve in-line. It does send out masses of tiny air bubbles, but if it's flat on the gravel (as manufacturers show it) my two large Goldfish cover it with gravel as they root for food, spoiling its capacity to release as many air bubbles, so I stuck it on the back of the tank, low down, behind a plant. Problem solved, emits all its masses of tiny bubbles. No more cleaning or keep replacing cheap 'air-stones'. Well worth its price! David.

Terrible, the only bubbles coming out were from the gaps in the casing, wouldn’t even give it one star but I have to give it at least that to leave a review

Lots of fine bubbles. Very pleased.

not very good only gives bubbles out on a quarter of it i soaked it for over 6 hours and still doesn't give many bubbles out

The media could not be loaded. I put my first review on after only a few hours and said the device was useless .. however after a few days this does activate and starts working as it should so I’d advise you to leave it in water running and it will cycle and start to bubble as advertised!! I reckon it just needs a few days to get going which should be in the directions so I won’t be returning it now as you can see it’s pretty cool

I used this product in my out door pond and it works brilliantly it is on for a couple of hours a day to aerate the water and also it disturbs the sediment at the bottom of the pond for the pump to take a way

Looks amazing on the photos - I was all in!Reality is despite my supermassive pump you get a stream of bubbles out of two places on the stone- not too dissimilar to my 29p stone it replaced. Sent back.