IMHO, for a return pump, I'd use what I'm using. the Marineland 5500 ( they make smaller and larger ), the same people that make the MaxiJets. This one is made in Italy- and it's like a ferrari for sure. Mine is quiet, and puts out 1385gph max. Always restarts by itself in a power out. It can be external, or internal! I use mine internal. It had good reviews, so I went for it and glad I did.