are you looking for in sump/or external pump.
If in sump then ehiem is the way to go, if external poiseden is the quietest you can get. I have a poisden and you cant even tell its running without touching it.
as for the drain noise, search for stockman drains, or durso standpipes to quiet the noise - they are easy to rig up.
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180 gallon LPS dominated reef
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