I have a 30x30x25 cube that I am setting up. The biggest opening in the stand is 23 inches. I am thinking about getting a custom sump built. I am thinking 23x23x15 or 16 tall. I am also thinking about making the flow in a u shaped design. Things to go in the sump are a alpha 200 skimmer and geo 618 calcium reactor. I am also thinking about a fugue area but not sure that's necessary with everything available today or not. Any idea's or pics would be great. Thanks in advance.