I have several 10 and 20 gal tanks that have no covers for them. I also have several sheets of stainless steel and aluminum laying around with a few scrap pieces of acrylic(but none big enough to be the cover itself). So I was wondering if it would work and be safe for the fish to make the covers out of the metal and just cut a hole then rivet a acrylic piece in for the light to go on? If not ill just bite the bullet and goto the glass place and get them to cut me some pieces.