I am planning on building a sump this weekend, if my design works. Hopefully the "drawing" has all the needed (other than it's 11.5" wide) information. I am unsure of the skimmer make (no identification on it), but the pump on it is a Rio 1100 (382gph), the pump in the return is a Rio 1700 (642gph). The second baffle of the refugium will be notched w/ 1/2 teeth, to insure direction of flow. I am planning on making it out of 1/4 plexiglass. I want to make sure to have enough room left over for overflow, so I can adjust to height of the refugium baffles if needed. Anyone have ideas, good or bad?