Looking great! I'm getting ready to do a rimless 2ft cube in a very similar way. Planning to get the tank from glasscages as well. Are the seams nice and clean on yours? As for discus just wait until you've got your tank parameters nice and steady. If you know you can control the water params then they shouldn't be a problem. They really aren't too bad so long as you can manage the water changes and all (or just go mega planted like I did in my 240g, helps ALOT with water quality). Have you thought about increasing the systems water volume with a sump?
Last edited by Turxiat; 05-11-2014 at 10:12 AM.