The Filtration
I'm going with a really simple sump design.
40g breeder as a sump
Semi-coast-to-coast overflow with triple "Bean Animal" style drains with 1" bulkheads and plumbing. It's an awesome design that's silent and pretty much fail safe.
Note that the emergency JG tubing on the open channel is missing in these pics. I designed it so I could easily swap the threaded caps between the different drains so I can switch which channel I want to use as the siphon and which one I want as the open channel. I've already switched them around once so this has been handy.
PVC ball valve on the siphon channel to fine tune the flow. Works much better than a ball valve. I didn't bother with valves on the other 2 channels since I didn't see why I would need them
Overflow works beautifully
Sump setup
I think the majority of sump designs are overly and unnecessarily complicated so I went with a really simple setup.
1. 40g breeder tank, no baffles
2. 200 micron 7" x 16" filter sock suspended over the outflow with a hook and a bit of rope.
3. Two 4" blocks of 10ppi poret foam spaced with a little compartment in the middle as a grow out area for fish
4. Laguna Max-Flo 2000 return pump - nice and quiet and really energy efficient
So far this has been working really well but I might add an extra 50 micron polishing pad to really get the water sparkling.
On the left hand side you can see I built a little shelf to hold a Ranco ETC temperature controller wired to a powerstrip that controls two 200W heaters. I think this is the safest and most reliable way to set up heaters - this way I've got a reliable thermostat rather than relying on the cheap thermostats on the heaters which are prone to failure.