Zibba it might be too late for these recommendations but I'll share them anyway!
You may consider rattle can painting the back of the tank (on the outside) this way you don't see the wall at all. I have done this on dozens of installs with great success. You can do black, or blue or whatever suits your fancy. However, it looks like you'd have to re caulk to do it...
Be sure you leave ample space for power supplies. Heat is a big killer of power supplies, stacking them, or stuffing them in compartments will guarantee a premature death. If you really want to keep them tidy in your box, I would highly recommend a small fan to circulate the air in that area, and be sure and have a substantial air gap between power supplies to aid in the cooling.
You may consider rattle can painting the back of the tank (on the outside) this way you don't see the wall at all. I have done this on dozens of installs with great success. You can do black, or blue or whatever suits your fancy. However, it looks like you'd have to re caulk to do it...
Be sure you leave ample space for power supplies. Heat is a big killer of power supplies, stacking them, or stuffing them in compartments will guarantee a premature death. If you really want to keep them tidy in your box, I would highly recommend a small fan to circulate the air in that area, and be sure and have a substantial air gap between power supplies to aid in the cooling.