To increase alkalinity use Alkalinity Plus (increaser). To reduce alkalinity use pH Minus (reducer).
Please refer to Total Alkalinity Sheet for amounts of chemical required to correct your Total Alkalinity.
Refer to Quantities of Chemicals Required sheet for amount required to adjust your spa by each 0.2 dose required as applicable.
To increase pH - use pH Plus (increaser). To reduce pH - use pH Minus (reducer).
If your pH and alkalinity is not balanced correctly you will not get a correct chlorine reading.
Chlorine Levels should be about 2-3ppm (parts per million) before bathing. You can bath up to 5ppm but anymore than this would beuncomfortable and not recommended. Less than 1ppm will mean that you are more liable to bacteria and pollution issues in the water.
Please refer to Quantities of Chemicals Required sheet for amount required to adjust your spa.
If you are using Stabilised Chlorine as your main sanitiser, it is recommended that you shock your spa using None Chlorine Shock (MPS) once a week.
HTA would highly recommend that you use this product on a weekly basis even if in a soft water area as this is not only used to help prevent scale build up but also helps to stop minerals from staining your spa.