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SpaGuard Spa Sentry hot tub balancer controls ph buffer

SpaGuard Spa Sentry

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SpaGuard Spa Sentry is a single step that completely controls hot tub pH for up to a month, ensuring your chlorine and bromine are effective.

  • Phosphate buffer
  • pH~7.5
  • Easy, one step liquid
  • Helps maintain proper pH in spa water
  • Softens water by removing calcium
  • Not for use in plaster or tile-surface spas
  • Not for use in Soft Soak® spas

SpaGuard Spa Sentry® is designed to provide a single step liquid additive to avoid pH bounce for up to 1 month per application. Spa Sentry also helps to remove dissolved metals from your water.



Always follow label instructions, dosages are provided here to inform your purchase decisions. These dosages are not meant as a replacement for label instructions.

1 bottle can treat up to 500 gallons of water.

if fill water has more than 150ppm calcium hardness, use 2 bottles for up to 500 gallons of water.

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