Ultra Acid 4L1. Lowering pH & Total Alkalinity (Pools & Spas) If your water is highly Alkaline (High pH), your chlorine stops working and scale builds up on your equipment. The Benefit: Ultra Acid lowers these levels quickly and efficiently. It is ideal for larger vessels (like Swim Spas or Pools) where dissolving huge amounts of granular dry acid is a hassle.
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