Free Chlorine
The active, unsaturated chlorine available to sanitize pool water.
Definition
The active, unsaturated chlorine available to sanitize pool water.
Quick Facts
- Ideal Range
- 1–3 ppm
- Units
- ppm
- Also Known As
- FC, free chlorine, available chlorine, FAC, residual chlorine, pool chlorine
Relationships
Outgoing Relationships
- affected by → pH
- affected by → Cyanuric Acid
- affected by → Temperature
- measured by → Water Testing
- calculated by → formula-02
- explained by → glossary/free-chlorine
- solves → Low Chlorine
- solves → Algae
- solves → Green Water
- recommended for → Swimming Pool
- recommended for → Hot Tub
- compared with → Bromine
- compared with → Combined Chlorine
- part of → Total Chlorine
- related to → ORP
- uses → Liquid Chlorine
- uses → Calcium Hypochlorite
- uses → Trichlor Tablets
Incoming Relationships
- related to ← pH
- related to ← Cyanuric Acid
- requires ← Breakpoint Chlorination
- requires ← Water Balancing
- uses ← Sanitizing
- references ← PHTA