I picked up a little 2.5 gallon glass tank today on the cheap, thinking to use it as a desktop betta or shrimp tank. It came with a solid glass canopy ... the top is a solid glass piece that fits snug and has no openings for a filter or airlines (bad design, yes). The glass is 1/8 think, much like versa-top glass. Has anyone cut additional openings in their glass canopies without breaking them? What's the easiest and cheapest way to do this?