What causes alkalinity to drop in a pool? Tips and fixes

It can be incredibly frustrating to test your water and realize you don't know what causes alkalinity to drop in a pool, especially when you've been keeping up with regular maintenance. You go out there, dip your test strip or fill your titration tube, and suddenly the reading is way below that sweet spot of 80 to 120 parts per million (ppm). It feels like a moving target. Total alkalinity is basically the "bodyguard" for your pH level; it keeps your pH from bouncing around like a pinball. When it drops, your water becomes unstable, your equipment starts to corrode, and your eyes might start stinging the next time you jump in. ...

May 7, 2026 · 7 min · Aluaro Enrique