Where we mention Acid Blue - Low Fume Muriatic Acid for Swimming Pools & Spas - 2 Gallon

• Pool pH: What It Is, How to Test It, and How to Raise or Lower It

  Low-fume acid · Best for: Lowering pH in a ventilated storage area

• Muriatic Acid Safety: How to Use, Store, Dispose

  Best low-fume muriatic acid (2 gal) · Best for: Routine pH/TA lowering for a typical backyard pool (15-25k gal). Low-fume formula reduces the choking vapor that scares first-time acid users; safer to handle around skimmers and equipment pads. Use when pH is 7.8+ and TA is above 100 ppm and you want to fix both with one dose.