Alumina Airstone - 1 1/2" X 1 1/2" X 6" - 3/8" barb
$24.69
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This high quality, fine bubble diffuser is constructed of an Alumina product, which is 3 times stronger than glass-bonded silca air stones. It has a 3/8 barb fitting.
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$20
$24.69
(+$4.69)