Hey guys ive got a few q's on a new project of mine and figuring out flow rates, gph etc. A little background info. I am setting up a 60g cube(1in drain 3/4return) and a 55g basement sump. So, i have approximately 11-12ft to push water back up into the main display. Off of the return i want to build a manifold for additional equipment to run off if needed(reactors and such). Ive acquired a magdrive model 24(2400gph). Now, my sump is directly under where my tank sits so its a pretty much straight shot to the top with the exception of a few unions and a gate valve(restrict flow if needed), plus the manifold that i want to feed. Ive used the headloss calculator and its saying i will be running about 754gph(which its not accounting my gph to run my manifold). Im thinking this is to much flow? Also, the mag 24 outlet is 1in in diameter that i will reduce to 3/4 for my return line, will that make a difference? Im debating on just running a different pump with a 3/4in outlet so no reducing needed and less flow. Im bascially confused and need help lol!