CYNTHIA J JONES
Posted: 12/25/2013 from OGDEN, UT UNITED STATES
My only complaint about the air stones is that they should be rounded as the square corners do not allow for easy removal when they need to be cleaned or replaced. Otherwise they work perfectly for the intended use as the 'bubble source' for a very small protein skimmer. I have found that withe the square shape, I need to use a pair of needlenose pliers to remove them and I have punctured a hole in the side on occasion.
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