Dolphin Pumps
I have a single Dolphin 9700 pump running my return, skimmer,frag tank, and refugium. The pump is located in my new fishroom and has been up and running for around a month or two without problems. The reason I chose this pump was for its capacity which is around 10,000 gph. I could not find any other pump available that could give me that max flowrate.
The pump is not quiet but it is in my fishroom that is in the garage where noise is not of concern to me. So far the pump has performed well.
I have much more experience with Iwakis which I ran for 4 years for return, skimmer and closed loops. They are outstanding and really quiet for their capacity.