Help with sump planning

[780blaster]

Hello! Just planning out a sump for a new build. DT is about 73" and the sump will be 36" long, 12" wide, 15" tall.
Due to upstream plumbing routing, I would like to have both the return pump and the roller mat on the one side of the sump hence the "down and back" flow of the sump.

Planned equipment:
-Bubble Magus G2 Med. Roller Mat
-Bubble Magus Curve 5 Extreme Skimmer
-2x Eheim 150W heaters
-AI Axis 90 Return Pump

I've attached a diagram here of my current plan. Looking for critique here. As well, just a couple of questions:

1. Do I need anything beyond the baffles around the refugium? will algae spill over?
2. I see people putting in aquamesh in various places. I presume this is to remove bubbles. Should I put a sheet between the last "under" and "over" baffles?
3. Would the 4" channel from the skimmer back to the return pump be too restrictive? (I made this narrower in order to make the refugium larger but can easily change it)
4. Any commercially available "adjustable baffles"?
5. Anything further that might be warranted to eliminate bubbles going into the pump?

Thanks folks!

 

[Timfish]

Make it as simple as possible. Accessability and redundancy are the two other considerations. Sooner or later stuff will fail. Having a system that won't crash if any single piece of equipment fails and having easy access are would be my prime considerations.

 

[cartery]

Interesting design. I was thinking something similar, but sort of felt like I might be over-designing. The only adjustable baffles I've seen for purchase that aren't part of a set are here.

I've also read that "longer" baffles do a better job of dissipating mirco bubbles. I'm not really sure what "longer" means, but I'm assuming width instead of height. So maybe the narrow 4" baffles won't work that well? But at the same time, the zig-zag pattern you have seems like it would provide the water enough "travel time" for the bubbles to get removed. Just a guess, though. I'm trying to build a sump right now and doing reading.

 

[cartery]

Oh! And another thought: I think you want to keep your heaters out of your return chamber. It looks like that's what you have? If the chamber runs dry you might get exposed heaters