The Planted Tank Forum - View Single Post - What size inline diffuser for an ehiem 2217?
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post #2 of (permalink) Old 03-19-2013, 04:05 PM
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Join Date: Feb 2010
Location: Long Beach, CA
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You need the 13mm one. It might be called a 12/16 also. This is referring to the tubing size of the output of your filter.
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