Some pools look like they should be easy wins until you’re standing there with a tile brush, extra chlorine, and a customer who expects miracles. We get real about the “lost causes” every pool service pro eventually faces and how to handle them without wrecking your schedule or your reputation. We start with calcium buildup on pool tile, where the honest answer sometimes is: you’re not brushing that off. I break down what can improve with topical cleaners, pumice stone, and elbow grease, and...