With spa and hot tub use increasing, we’ve put together a handy spa chemistry guide with all the information you need to manage the water chemistry of your spa. The spa guide provides you with definitions of the key parameters that are most important for spa management, a guide to the recommended levels and the effects of poor water monitoring.
Bromine in Spas-Recommended bromine levels in the UK for pools and spas are 4.0 – 6.0 mg/L with shock dose of 10 mg/L.
Calcium Hardness in Spas – Calcium hardness should be measured once a week, and a level between 80 – 200 mg/L maintained.
Chlorine (Free and Total) in Spas – If chlorine is being used in a well-designed spa you should be looking for a free chlorine residual of 3.0 – 5.0 mg/L. The combined chlorine should be as low as possible and certainly less than half the free and never more than 1 mg/L.
Cyanuric Acid in Spas – Levels should be below 200 mg/L, with many authorities suggesting levels between 25 and 50 mg/L are ideal.
pH in Spas – Ideally you are looking for a pH of 7.2 – 7.4, an overall range of 7.0 – 7.6 is acceptable in most spas.
Phosphate in Spas – The level of total phosphates in the spa water should be 0.01 mg/L or below.
Total Alkalinity in Spas – Levels should be in the range 80 – 200 mg/L CaCO3.
Turbidity in Spas – The level of turbidity should be 0.5 NTU (Nephelometric Turbidity Units) or less.
Palintest always recommends that you seek advice on your local authority legislation.
Currently the contact form is under maintenance, please use the below contact details to speak to your local Palintest branch where a member of the team will be happy to assist.
6th October 2022
Ensuring drinking water is safe for human consumption is of the highest priority across all drinking water providers. Water goes through multiple stages of processing in a water treatment plant before it is deemed safe for consumption. This article explores the water treatment process, with a specific focus on disinfection and how Palintest’s new Lumiso Expert photometer can ensure this process is managed efficiently.
14th June 2022
Ammonia is naturally found in water, as it is produced through the decay of organic matter as well as by humans through the production of fertilisers, plastics, pharmaceuticals, and petrochemicals.
31st May 2022
It is important to monitor drinking water quality to ensure it is safe for human consumption and meets legal standards. Wastewater monitoring is also important to ensure contaminants aquatic life is protected from harmful chemicals.