Scale or Corrosion: The Silent Destroyers of Pools

Ever run your hand across pool coping and feel sandpaper? That texture tells a story about water that’s either starving for calcium or dumping it everywhere. We take you inside the Langelier Saturation Index—the tool that predicts whether your water will corrode metal and etch plaster or lay down crunchy scale on tile, heaters, and salt cells—and show you how to control it with confidence. We start by anchoring the basics: calcium hardness sets the foundation, temperature shifts the baseline...