The Planted Tank Forum - View Single Post - CO2 line into HOB
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Old 02-01-2013, 02:24 AM   #3
Yankee
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I've done this before with an AC20 and it works good well. You'll have some noise since the bubbles will be hitting the impeller - I'd suggest you use a very skinny air stone and make sure to build a bubble counter so no yeast builds up at the end of the tube and clogs/infests your filter.
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