Swimming Pool Chemicals Guide: Sanitizers, Balancers, and Specialty Products

Pool chemistry doesn't have to be confusing. Test first, then treat with name-brand chemicals in the right order. Here's the essential breakdown.

1. Sanitizers

Chlorine or bromine—kill germs and algae. Maintain residual per label.

2. pH Adjusters

Target 7.4–7.6. Low pH = eye irritation, corrosion, fast sanitizer loss. High pH = scaling, poor sanitizer efficacy. Acid lowers; base raises.

3. Balancers

• Alkalinity Increaser: Stabilizes pH.
• Calcium Increaser: Protects equipment and surfaces.

4. Stabilizer (Cyanuric Acid)

Shields chlorine from UV—cuts usage 30–50%. Not for bromine pools.

5. Specialty Chemicals

• Algaecides, clarifiers, metal removers, phosphate removers—solve specific problems.

Key Principles

• Test with a quality kit before adding anything.
• Balance = proper pH, alkalinity, calcium.
• Adjust for temperature and cumulative inputs.
• Use name brands—avoid contaminants.
• Dose by pool volume; ranges vary by surface (vinyl, concrete, fiberglass).

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