How to Make an Algae Scraper

I didn't know how to do anything and no one around me to teach me so in order to learn I just started calling up factories and saying hey I'm trying to make an algae scraper. And that having been a professional algae remover at the time the only thing available was a sponge on a stick or a magnet scraper which is fine if you get one tank but if you're cleaning tanks all day long the magnet's inefficient and doesn't work very well. So I just wanted a high quality product that was like a carpenter's hammer. It didn't need to be miraculous it just needed to not be junk."