75g sump for 125g reef tank. I forgot to draw the heaters in, but one with skimmer and one with return pumps. This is the rough draft so far with maybe wool in first chamber instead of filter socks if it's easier to change out. Any thoughts?
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I probably will do something other than filter socks. Lots of people complain about them and cheap replacement > cleaning, lol. My thoughts on refugium placement was for lower flow and to avoid copepods going through skimmer. Certainly understand nutrients being removed prior to refugium would slow down macro algae growth.
What if you keep the plan you have, but instead of adding water to refugium area from the return line, split the drain line flowing down from tank and have it supply the refugium too. This would keep most flow going into sock/skimmer portion and a smaller line to fuge with a valve to lower flow to where you want it, with some extra nutrients too.