The Planted Tank Forum - View Single Post - Best placement for CO2 diffuser in Fluval Edge 6G?
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Old 01-12-2013, 03:21 PM   #3
AnotherHobby
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I have a 12 gallon, but it should be similar. Mine is under the output, and as the bubbles rise and get to the top, the output pushes them back down into the tank. The diffusion is good, but I do get a lot of bubbles on the top of the tank. It doesn't bug me though because the plants look great.
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