I am trying to optimize the flow throughout my system.
I have a 50g refugium, which is connected to the display tank (270), sump (40-80) and a frag tank (30).
What should be the idea turnover rate for the refugium based on the size of this system? would 2x or 3x be enough? I don't have a lot of growth in there, the refugium is pretty much used as a food source, and some softies..