• Chlorine sanitizer in granular, fast dissolving form
• Sodium Dichloroisocyanurate
• Chlorine is effective in keeping hot tub water safe (3 – 5 ppm)
• Kills germs and micro-organisms
• Use as primary sanitizer or as a boost 
• Not preferred for periodic shocking
• As an instant boost:
  • Establishes residual after fresh fill
  • Re-establishes residual when < 3 ppm
• Stabilized form of chlorine
• Totally soluble – won’t cloud water

When:

• As the primary sanitizer:
  • Hand-feed method
  • Apply daily or as needed to maintain chlorine residual of 3 – 5 ppm
  • Use a test kit or test strips to check
• As an instant boost:
  • Apply any time the chlorine residual drops below 3 ppm
• Can be used with Mini Chlorinating Tablets as effective maintenance method