Chopper here. Getting over vacation problem from a few days ago. Nitrates still a little high, went and got some macro-algae, and have done a 10gal and 5gal water change since Mon. to help. I was interested in getting a refugium, as that should help my water quality. I went and priced some, and was wondering if anyone had any good ideas on cheap refugiums. I am willing to build one, or maybe someone has a good idea of something that I can buy cheap at Home Depot or something that can double as a refugium. Any suggestions would help.