The Planted Tank Forum - View Single Post - Best Pre-filter for HOB
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Old 12-30-2012, 12:23 PM   #18
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Originally Posted by jhays79 View Post
I'm confused, where are you guys using the pre filters? All the filters on my hang on back filters are rectangular?
They go over the intake strainer of the HOB so they are inside the tank, not inside the HOB.
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