Bromine Hot Tub Maintenance Guide & Schedule

Bromine is a popular alternative sanitiser to chlorine for some hot tub owners as it is better for sensitive skin and has a less harsh odour than chlorine.

Please Note: Bromine is an alternative to chlorine and should not be used with other sanitisers. The guide also recommends the use of No Scale however this is only needed in hard water areas.

How does bromine work?

Bromine works in a very similar way to chlorine in relation to killing bacteria and harmful contaminants in hot tub water. Bromine is more stable in water at higher temperatures, which on top of the other benefits is why some hot tub owners have opted to use it.

Daily hot tub use:

A bromine level of between 3-5ppm (parts per million) must be maintained in your hot tub at all times. The addition of bromine will depend upon usage and bathing habits. It could be daily or every 2-3 days (for 3ppm add 12g per 1500 litres).

Note: 10ml = approx 10g

Weekly hot tub maintenance:

When adding chemicals as part of the weekly maintenance, it is important that the pumps are running, and the cover has been removed.

  1. Remove the hot tub filters and rinse them with a hose pipe and leave them to dry. If required you can use a filter cleaner spray to prevent any build-up of grease and we recommend purchasing a spare filter, which will allow you to rotate them and increase their lifespan.
  1. Check the pH level is between 7.0 & 7.4 using pH testing strips. If the level is outside of this range, then you can use a pH Increaser (pH+) or pH Reducer (pH-) to balance the water.
  1. Using bromine test strips, ensure the level is between 3-5mg/l and if it is below this level add additional bromine to the water.
  1. Add 17g of non-chlorine shock per 1500 litres of water, ensure the jets are switched on and leave spa uncovered for a minimum of 20 minutes. This step is more important when the hot tub has been heavily used to keep the water sanitised.
  1. Finally add 23ml of no scale per 1500 litres to help prevent scale build up, especially in hard water areas.

Quarterly hot tub maintenance:

As with the weekly maintenance, it is important that the pumps are running, and the cover has been removed.

  1. Remove & soak the filters overnight in a large container with filter cleaner, rinse with a hose pipe and leave to dry.
  1. Fully drain the hot tub and fill it with fresh water.
  1. Balance the pH level by following the instruction in step 4 above.
  1. Add 60g of bromine granules per 1500 litres to sanitise the fresh water and allow the level to drop down to 3-5mg/l before allowing the hot tub to be used.
  1. Add 38ml of no scale per 1500 litres following a full water change

Our Bromine Maintenance Guide is a quick reference for your convenience. Please consult your chemical guide, the instructions on the product or call us if you require further information. Note the quantities shown are based on a spa water volume of 1500 litres so adjust accordingly.

Helpful Tips & Guides:

Cloudy water is caused by small particles (like soap) that are passing through the filter and can be cleared with spa clear and foaming can be corrected with no foam.

The use of bromine tablets in a floating dispenser can be used if you’re leaving the hot tub for a short period of time or going on holiday to maintain the correct level.

For additional help and guidance, we have a series of guides available: