120 Gallon custom wall tank

My new tank is about 8 months old. It is an old window opening in my basement . its 36" tall x 36" high by 21" deep. Sits on a metal stand with a 25 gallon sump below with BioBalls, carbon filtration. I have a UV light and pump with (3) BuildMyLED lights and a CPR protein skimmer. Have trouble with space because I made the tank too wide. CPR skimmer was the only one that would work, but I have an overflow container with a tube to draw off waste. Works great. Have been out of the hobby for 25 years and boy had it changed!