I'm looking to buy a refugium 16" wide or shorter to hang on my 65g. If you have an old one to sell, I'd be happy to take it off your hands!
Finnex has these. I've been using this one for over a year. They are cheap too. Comes with pump and light. It's on the side of my 29g bio cube. www.amazon.com/gp/aw/d/B00I8BREP2/ref=mp_s_a_1_1?ie=UTF8&qid=1493684728&sr=8-1&keywords=finne
You know what I really want? I'd like a custom acrylic, hang on the side, completely clear, display tank for pretty algaes. 18" long by 24" tall and about 6" deep. Do we know anyone who custom builds acrylic boxes?
@doubleorange actually designs acrylic items.. he may be able to do something for you but acrylic isn't cheap.