Elite Deluxe Oval Air Stone 4-Inch

I'm running this on a JW Fusion 500 pump and KAPOW! Major bubbles. The 500 is also running another small airstone besides this disc, but it doesn't seem to decrease the bubbles off this disc. Only thing I'd prefer is that the bubbles were smaller and mistier, but oh well. The fish like it and it looks great. Like another reviewer said, it does want to float, but I just used a suction cup on the line near the floor and piled rocks around and even a few on top of the disc. Works great and looks awesome.

Puts out good air..my pleco still moves it around so I had to help anchor with a few stones..works well though

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Yes, it makes bubbles, which is good. But the bad news is that it floats... Really, what kind of air stone floats?! I had to tape two heavy washers on it to get it to stay underwater.

This company should really work out this awful engineering oversight ASAP.

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Stone works well, but it is not heavy enough to stay on the bottom. I had to add weight for.....

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This is the second and last time I'll buy anything from the misnamed "Elite" brand. This item FLOATS and emits most of its LARGE bubbles from its bottom vents (!) with three or four small streams of smaller bubbles coming from where all of the bubbles are actually supposed to come from. And, yes, I let it soak for way beyond the typically recommended 60 minutes before I used it.

The other defective item I bought from them was a 4" air stone bar. It emitted bubbles from about 1" of its total length.

This company either never tests the air stone products it makes, has nonexistent quality control, or both.