I have a used 65 gallon I am setting up. I am using a used 55 gallon in my basement as my sump. It will have bubble baffles, a refuge, etc. I am pumping up 15 feet from the basement. It wont have any 90's, just a straight shot. I decided to y in and out the 25 watt UV, I put ball valves on both outtakes of the Y so I can regulate flow through the UV. This was a great suggestion, thanks for the info. This way I can run it fulltime through the UV if the flow is low enough, otherwise I can partially block it to slow the flow.
I bought a Mag Drive 36 pump 3600gph.