Height/Placement of Filter Intake

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CPARKTX

Aquarium Advice Apprentice
Joined
May 31, 2017
Messages
15
I have a fairly tall tank (20 gallon hex), with a HOB filter. The bottom of the filter intake is about half way down the tank. Is that enough, or should I try to find some type of extension to get it closer to the bottom? Will a longer intake tube reduce flow or strain the impeller?
 
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