all kidding aside, I just spent the second best $12~ I ever have in this hobby.
I bought the EasyBlade which is just a typical razor scraper, but has an arm that you superglue to the back of your MagFloat (or similar) algae scraper. This thing tore through all the coraline algae I had built up in the corners and the algae the snails we're missing. Made that portion of my maint an absolute breeze. The only criticism I have is that the blades for it are not stainless and so have to be removed from the scraper and dried when you're done.
I said second best, because the best $12~ I've spent was on the mag float