I been planning for a while now how I'd like my next tank to be like and finally came up with something I thought would be pretty cool. I'm planning it to be 48"X24"X20" (100 GALLON) Rimless or eurobraced, 1/2" or 3/4". Got a quick quote from a local builder last week and I want to finalize it soon. Heres some drawings I did. At first, I wanted to do an external overflow but I really dont want the tank to stick out too far in my tank room so i decided to make it internal stretching the length of the tank like a false wall. each corner will be sectioned off, sand or rock rubble will be added halfway or 3/4" up to the top to grow mangroves. I love the way tanks look with the mangroves growing out of the overflows! Sorry this pic is very deceiving. it looks like smaller boxes in the corner mangrove sections but in actuality should be the same exact depth as the overflow section in the middle. So the concept is water will drain from the display simultaniously into overflow and mangrove sections, then the mangrove section flows into the overflow section. The cutouts from the mangrove section to the overflow section will be lower than the teeth from the main wall. The mangrove corners will have fewer teeth so the water will come in at a slower rate (or atleast thats what i want to happen). Over flow section will house dual 1" drains on each corner and the return in the center. Left one will be main drain and the right one will be slightly taller and act as a emergency drain in the event the main one plugs up for some reason. Not sure what size return should be. Can anyone make a suggestion? I want a slow turnover rate to get maximum filtration in the sump. Still not sure either how i want to configure the return and would like for a really clean look but figure loclines going over the center baffles will work. This is what i have so far. Please let me know if you have any suggestions on anything i should change out, what may not work, etc etc. Your thoughts are greatly appreciated!