Originally Posted by
costa13
I found this at melvsreef explaining the difference designs.
"What is the best layout?
There are a number of ways to configure the compartments, including some comments:
Skimmer > Refugium > Return
This is a simple layout that keeps the flow going in one direction. One objection often voiced is that “you don’t want to skim out the nutrients in the water going to the refugium.” This isn’t possible to do, unless every drop of water had to go through the skimmer to get into the refugium. Most of the water runs right past the skimmer! Even with a very weak return pump, the water pumped into the skimmer is only a portion of the body of water traveling into the next compartment.
Benefit - all baffles are the same height.
Skimmer > Return >Refugium
In this situation, the two outer compartments receive their water from two sources (or one supply line that has been split), and pour into the central compartment.
Benefit - Refugium wall can be taller, and the amount of water flowing through it can be controlled with a ball valve.
Refugium > Skimmer > Return
This is a bad idea in my opinion, because the micro fauna (copepods, amphipods and more) that you hope to send up to your display tank as food are going to be skimmed out of the water before they ever reach the Return zone. If this is your layout, have the refugium drain via PVC pipe directly into the Return zone, bypassing the skimmer zone.
Benefit - none."
I hope this answers your questions.
Design looks good.......Have you started the build yet?