Okay. So what is the likelyhood that the Eheim simply has to work too hard? I'd be willing to try a different selection of components. I have a BIX "laying around", so I could go to a 1/2"ID system with e.g. the MAZE blocks. I suppose that would be beneficial to the flow, but would it help reduce the hum/vibration? Or do I need to look for a different pump?
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