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The price of aeration

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FishinDave07

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Has anyone had decent results aerating their beer with an O2 stone from walmart? Are the ones sold at HBS more/less porous? Larger/smaller holes?
 

Funkenjaeger

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First off, a recent thread:
https://www.homebrewtalk.com/showthread.php?t=56340

Home brewing airstones have 2 micron pores (for air) or 0.5 micron pores (for pure O2) and are made of stainless steel so they can be effectively sanitized. Aquarium airstones are made of various materials, may or may not be safe for food use, and may or may not be capable of being effectively sanitized - plus their pore size is generally unknown, but if I had to guess I would guess it is much larger than the home brewing ones, which would make oxygenating take a lot longer. Not to mention, you should really be using an in-line HEPA filter when using air, which you wouldn't be likely to find locally and would have to order from a homebrewing supplier, in which case you might as well order a real airstone as well.
 
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