Penn Plax Add-A-Stone Air Pump Accessories, 10-Inch by 2-Inch

To those complaining about no bubbles, it's because your pump is too weak for the length of your airline and size of this air stone. It's a very big airstone so needs a powerful pump to work as best as it can. Otherwise it will just let out a small dribble of air.So yes, they work, and very well. But no they're not meant for a tiny tank with some crappy little airpump. I'm using mine for my hydroponics setup and it works fantastic.

Bought this for my son’s first aquarium. It works very well, but you must use a strong air pump (not a cheap one) if you want to create an authentic bubble wall.Make sure you soak the stone in water prior to set up. You can lightly press your fingers onto the stone to ensure the water is penetrating. You can verify this when you see the stone darken from pressing your finger tips on the stone in submerged water.Sits well in gravel and works exactly as stated.

First use the bubble wand was impressive looking. Makes larger bubbles than expected but in my large tank that look works. Did not use the suction cups so I can't comment on that. I layed it in the bottom of the tank on top of the sand and it does not move so all good there. Within a few days the bubbles in the centre section stopped coming through the entire length leaving some gaps. Too bad otherwise much higher rating would have been given.

I had thought when I bought it that it would worked,,, Surprise SurpriseThe bubbles Comes from the end for the supply ...It appears that the seal between the plastic retainer and the stone is defective.It' been suggested that a bigger pump would fix the problemI have a commercial air pump and only turned on the valve feeding this stoneIf the pump is the problem I'll hook it up to my air compressorIt's garbageI had 2 come in and both are POS...No difference than just leaving the hose open in the water

Just like other reviews have said, the bubble sonly come out at the very end where the airstone attaches or the bars attach to each other. I'm using the shortest possible length of air tubing, and the air pump is rated for a 115gallon tank. I'm trying to use 2 of these air bars in a 20 gallon tank so obviously a lack of power isn't the issue.