The 2-Cups-Equals-a-Pound Lie, Available Chlorine, Active Strength

Ask a question here It’s the day after Christmas, and Rudy is not here to sing carols—he’s here to correct one of the most common (and most expensive) field habits in pool service: measuring dry chemicals like you’re baking cookies. The “two cups equals a pound” rule gets dragged into the sunlight, and then the episode pivots into a full chemistry fundamentals reset that separates pool-water reality from industrial-label marketing. Rudy breaks down the difference between “available chlorine” ...