Ok so after little reserch Ive come up with a plan for everyone to shoot holes in and tell me whats wrong?
Idea is a 20 Gallon Long DYI Sump with overflow boxes.'
For the Overflow box im looking at this 800GPH - Reef Aquarium Filtration: Eshopps Overflow Boxes
For the Return Pump im looking at a Mag drive 7 Pushing 700GPH - Aquarium Water Pumps: Supreme Classic Mag Drive Pump
I understand due to gavity im not gonna really get 700GPH but Im really shooting for around 600. How does this look, please give me some ideas and Tips!