Glass drill bits. Yep, diamond coated. You can get them cheep at Saltwater and Reef Aquarium Supplies - Bulk Reef Supply. Home depot and lowes also sell them.Thank you both for the help! and that seems to be the vibe around the board that petco/petsmart misters are not worth it. And Doug, how do you drill a hole in the tank? a baby diamond plated hole saw? haha
You can do it with a steady hand, drill, water, and a dish towel. I've been meaning to put together a video on my ghetto drilling technique.