• Over sanitizing
• Low or high pH levels
• Poor quality sanitizer
• Bacterial infection caused by under sanitising spa water

Note: Please ensure you always follow the dosing instructions of sanitiser you are using and use a high quality sanitiser that is designed to be used in spa pools.

Readings of 7.2 - 7.8 pH are ideal for spas. If your reading is below 7.2 pH then your water is acidic and you need to add a pH increaser or Alkalinity increaser which will raise the pH and Total Alkalinity. If your spa water pH reading is above 7.8 pH then it is alkaline and needs a pH Decrease.

If you discover a bacterial skin infection from the water, please follow the steps below:

• Drain your spa, before draining run a heavy duty pipe degreaser through your plumbing.
• Wipe down spa shell and spa cover inner side with Biocide.
• Remove spa jets and headrests and clean with white vinegar or Biocide and leave out in sun to dry. 
• Air our pipework after draining spa.
• Discard of filters and replace with new ones after refilling spa.
• Ensure you know how much sanistier you should be dosing and that you are using correctly.