cons: you must anchor this product somehow (rock on top, strategically placed, for example), because when you pump air into it, the whole thing wants to float.
A good product if you can keep it from floating to the top.I was looking for something that would create a bubble curtain . This is bright blue, and i have natural stones so it's REALLY visible. Add to that it only bubbles from one tiny section. What's the point of a long rectangle shape is only one dize size section will actually bubble? I could have just stuck a tiny bubble stone on the end of the hose for that effect.I bought this stone because I thought it would be just that. A stone. I bought four of them for my outdoor pond, and only one of them sunk to the bottom. Well you might say I have too much air? Well I don't, the stone doesn't even put air out all the way though the stone, air flows out right away. As soon as the stone starts all the air leaks out. One of the stones did work fine. So for 3 of 4 stones, nothing work. One of the stones, worked just fine. If you need 1 working stone, buy 8. Not worth the puchase.I linked 2 and my Tetra 40 gallon air pump couldn't make it bubble the full length, even after 2 weeks. I finally pulled one off.


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