It's a 75 gallon sump, 110 DT. 1 drain & 1 return.
The question is: Do i need the bubble trap or is the tank big enough? The middle is where the skimmer and reactors will be.
Here is mine. I used two baffles instead of three for the trap because I will have sponges between them. I didn't think three baffles would be necessary. I keep sponges in the sump for future quarantine purposes. My fuge is in the middle. I don't run a lot of flow through the sump so this design works well for me.