The short story first is I had an existing 730 gallon reef tank installed in my office at our first commercial location. Tank was purchased online from an outfit(not to say who but they don't have a very good record). Needless to say that I could not turn down the price of this tank. It was at least 50% cheaper than every other tank I could find. Like the saying goes you get what you pay for. One day I came to work to find a broken center brace. Luckily the tank did not fail and I knew I needed to make a change. At this same time we were in process of moving location so it was time to do a full reboot. There was several things that I wanted to correct and things I learned from old tank that I was determined not to repeat. Here is pic of my original tank. We were doing a full retrofit of the new location so it lent me time to do things the way I wanted to fix the issues that I felt were holding me back from having the dream SPS dominated reef tank that I always wanted. The short list of what I thought were issue in this first setup; 1) If I was going to do this again I am going to get a better built tank. 2) Had main pump fail while I was gone. Redundant return pumps needed! 3) Sump was poor quality acrylic that started cracking 4 years into use. 4)Poor space for equipment. I had equipment stacked on top of each other. Made it very hard to work on tank. 5)Live stock. Mushrooms, mushrooms, mushrooms everywhere stinging my corals and spreading uncontrollability. RBA's taking over tank. Pests that I could not get rid of. Ich ect... 6) Better testing, meaning I would test regularly. 7) Media reactors being fed with small pumps that would fail and not know it. 8) Move away from the 6 400 watt metal halides that used a tremendous amount of electricity and created a lot of heat. Just a short list but what I thought was really keeping me from obtaining my dream tank SPS dominated tank.