Well as I have been progressing in the hobby my equipment is beginning to grow and my small sump/refugium crowded. I saw the $1/gallon sale and picked up a 40B. This will also let me have room to upgrade if/when I decide to go to a bigger tank. I have baffles that are made out of 1/4" plate glass. I'll use 100% silicone probably GE1 to secure them. The plan is to keep it pretty basic, but I'm thinking I'd like to have a center return and Y off the return and put a ball valve to slow feed the refugium, which will be on the far right and will flow back into the center. I will have all my plans drawn up and pieces gathered tomorrow and my plan is to tackle it this weekend. Any advice is appreciated as this will be my first sump build and there are some very experienced diy'ers around here.