quietest return pump

[sphelps]

Red Dragon 10 m3 fits your requirements, not sure about your budget though. I'm running a 6.5 and I can't even tell it's on unless I place my hand on it. It runs very cool and has very little vibration. The new gens now have anti lime bypasses and titanium shafts so be sure not to get old stock if you go for it.

I haven't seen the gold dart in action yet but every other reeflo pump was noisy in my books.