LOL, Internet was down Yesterday, but GoobS helped you out a long way.
He's completely right about getting a cheap/ free tank with scratches to use as a sump.
The plumbing is the hardest part, I think.
But that's not even hard.
You can silone some cut glass plates into the aquarium, to make your compartments.
I filled my sump with loads of porous stone and lava stones.
i added some ceramic rings and some green foam pieces.
I put a conector at the bottom of the overflow and attached a huge hose with a hose clamp, the outlet end above the first compartment.That's the only plumbing on that end.
On top of that compartment you see a glassframe That's build to minimize splatter and is filled with 1" foamcubes.
I filled my overflow with blue filterwool, topped it of with a green foam slab, and got some white cottonwool on top of that.The cottonwool will keep most dirt out of your filter and changing the white wool is the only filtermaintenance I do every week!
This is the Central heater pump I use, heavy duty!!
For the plumbing:
You don't see the pump in the pic, but it behind the soundproof box for my airaetor.
1 end of the tubing is in the last compartment, attached to the pump.
On the other side the tubing goes through the dry-chamber at the other side.
I got valves and a short cuircuit tube but you don't need those.
Man, this is becoming one long post.lol
Let me know if you uderstand my system!