Eco Plus Large Round Air Stone

Strong bubbles. Had it for a couple months now and still works like a champ.

Great for cloning if your trying hydroponics. The bubbles the stone creates splash the stems perfectly for even distribution.

The air stone I received did not look like the one in the picture. Instead, it looked almost exactly like this:Hydrofarm ASCL Large Active Aqua Air Stone Cylinder, which I ordered for comparison. The only difference was that the sealant used to secure the fitting was more like cement rather than rubber sealant. The other product is also a dollar cheaper. However, because they are so similar they probably will be similarly good.

Update: Be sure to have a powerful pump to use this air-stone to full effect. Something rated for up to 20 gallons is too little; bubbles will only come out of the top where the fitting enters the stone. Added a star because it works fine with a 7.8L/min pump.

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I USE THE AIR STONE IN A HYDRO GARDEN AND A 4 WATT AIR PUMP....THE BARB ATTACHES TO A 5/16 HOSE....THE STONE PROVIDES EXCELLENT OXYGEN TO THE WATER...GREAT BUY WAS ONLY A FEW BUCKS...WOULD BUY AGAIN

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I have 2 of these in a 300 gallon tank right now and they work just fine. No problems whatsoever. They seems to put out a good amount of air

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Where it is formed around the end was poorly constructed and leaks air around end... I would not buy again....