Copper sounds like the perfect pool hack: add a “mineral system,” fight algae, and use less chlorine. The reality is more complicated, and that gap between marketing and chemistry is where stains, green hair, and unsafe water conditions show up. We’re joined by industry legend Bob Lowry, whose voice and teaching still carry weight across the pool industry, to give a clear-eyed answer to the question pool owners ask every year: is copper safe to use in a swimming pool? We talk through how cop...