So am I crazy, or can it be done? I had the idea to use 1/4 inch thick plexiglass (acrylic) to make a 1/4 cylinder to go in a corner. It would be small maybe 5 gallon just for shrimp. I have the skill needed to bend plexiglass, I've made a few windshields for airplanes. All you need is heat and patience. Then you seal it together with aquarium silicone which I know for a fact will stick to plexi. Let me know if you've done it, know someone who has or know why you shouldn't try it. Or if you think I'm nuts, lol.