A couple hours playing with various scraps of acrylic, egg crate and a $0.59 piece of screen gets me this:
This will go in an empty compartment in one of my fuges. The screen will be tilted at 15* to force air contact. It has stand-offs at the top which will lean on the side of the tank. The small piece of acrylic in front/bottom will be painted black and help prevent the air stone from growing algae. Both pieces can be easily removed for cleaning. And if there is any issue of attempted floating I can weigh down the egg crate in the back.
While I am estimating that I would need 120 inches by the end of summer, this one's surface area is only about 75 square inches. But it fits perfectly in that particular section. If I need to make a 2nd screen I have real estate elsewhere I can use.
At this point I really just need lights and an air stone.
I'll likely get an air stone soon but the LEDs might be a little while off. Would it be even worth my time to throw a 15w CFL spot light that I already have at the screen once it's installed until I get my LEDs?