I am a bit late on the build thread seeing I'm 2 1/2 years late. This is my first reef tank and I started with a standard Biocube (32 gallon AIO). The more research I did, I found that everyone recommended more water volume for stability. I decided to try making my own custom sump to fit in my stand. It added an extra 10 gallons to my total volume. It also gave me a place for a bigger skimmer and the option to grow macro algae. Here's what I have accomplished with the help of #Reef2reef