About a year ago I took down my old planted tank display which was a 40 breeder...
I did this so I could put bigger tank in the same spot. I just wanted to use up all the available space and the biggest tank I could fit in this particular corner was a 48" tank. Biggest with that length I found was 24" x 24" x 48" 120 gallons. I also wanted to build my own stand so it would match the stand of my other three display tanks...
I decided to build a background for in this tank for the right end and back which both sit against walls. I went with the stiro insulation and coated it with silicon and then just smeared a gravel sand mixture into the silicon to give it a natural look. I wanted this to be a low pH soft water tank so I used all non-reactive substrate for the background and later in the tank...
I also ordered a rain barrel to collect water from my downspout so I would have free soft low pH water for this tank. Problem was when I first set this up we were having one heck of a cold winter that really lasted a long time, so I went out in the yard with a show shovel...
It took several days of melting snow into the tank to get it full, this first batch only resulted in about 2-3" of water above the substrate. Eventually though I got the tank full of water and it was pretty cloudy at first...