Hello, ok here is my issue. I have a 300 g saltwater predator tank with a 6250 gph pump but after head pressure it is pushing roughly 4700 - 5000 gph. I have it plumbed from 2" down to 1.5" then at the loc line it is down to 3/4". I am running a Y on them so it goes into 2 loc lines. I will most...