Size (grams)


Powerful pH controller to increase sanitiser efficiency. Easily dissolves and quickly reduces pH in spa water without fumes and vapours. Correctly maintained pH prevents scaling and staining on spa surfaces and equipment.

Directions for use: 

  1. Add 2.5g/1000L to lower pH by 1 decimal point
  2. Use a spa test strip to determine the total alkalinity and pH of the spa water
  3. The correct pH for spa water is between 7.2 – 7.6
  4. The correct total alkalinity level for spa water is between 140 – 160ppm
  5. When the pH exceeds this level, Hy-Clor’s spa pH decrease should be added to reduce the pH –  Do not add more than 20 – 30g at any time – allow 1 – 2 hours after pH decreaser is added before testing again
  6. Then, if needed repeat the dosage until correct levels are obtained
  7. Dissolve product in a bucket of water and distribute evenly in the spa avoiding the skimmer and metal fittings
  • Drops pH instantly
  • Fast dissolving 100% soluble
  • Won’t cloud spa water
  • Odour and vapour free
  • Makes all spa oxidisers more efficient
  • All spa surfaces
  • All spa types
  • Suitable for ionised pools and spas
  • Weekly
  • Monthly
  • As required
  • Reduce pH levels
  • When water is too alkaline
  • Correct pH levels can save thousands in other spa chemicals