The other thing to consider is that you may be constricting the suction side of that pump. Hard to tell from the photo, but it looks like smaller diameter piping than the pressure side ..... plus it is too long. That may be causing the pump to vibrate/cavitate unnecessarily.
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Simon
Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones!
Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs
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