Where we mention EZ Pools Muriatic Acid for Swimming Pools & Spas – Pack of 4 Gallons

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

  Bulk acid option · Best for: Saltwater pools needing regular acid corrections

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

  Best bulk muriatic (4 gal, ~$21.50/gal) · Best for: Larger pools (25k+ gal) or repeat-dose owners who adjust pH/TA every few weeks. $21.50/gal is roughly half the per-dose cost of the 2-gal starter. Comes in a 4-pack so you can stage doses over the season instead of buying in a rush mid-summer.