I’m using a Jebao DCP 10000 running a SCA 90 and a 40 breeder and it’s running at about 50% with more than enough power for both tanks, I would run 1” off pump as far as you can go, then put a 1”T reducing to 3/4” going to each return nozzle so you get equal flow through each outlet. I love this pump, it’s super quiet and does it’s job well!