Brainstorming a pool urine detector 404 page and April Fool's event, I share how to design an engaging sales page for a fake product. Inspired by the myth of a pool urine detector dye, I discuss creating a convincing product to deter pool pee-ers. The sales page includes a hero image, how it works, history of the myth, pop culture references, and statistics on the dangers of pool urine. I also explore the importance of design and storytelling in making the page both believable and entertaining.