If there’s one subject that shows up in my inbox more often than any other, it has to be rust. Ugly, orange-ish stains on tubs, showers, toilets, washing machines, sinks and even stainless steel. One ...

Question: We have a crushed aggregate surface on our pool, and it had been perfect until last year when a few rust-colored spots started appearing. This year the stains have gotten much worse, and our ...