Before we go on, it’s important to note that traditional wooden hot tubs (those without an internal liner) are not suitable for use with chemicals. Bacteria can multiply rapidly in a hot environment, so you must maintain an appropriate sanitiser level to ensure any bacteria in the water is killed. If you can leave the cover off for a few hours, especially on a sunny day, a combination of evaporation and sunlight will help to break down the bromine faster. In addition, bromine has less odour than chlorine and does not produce any by-products (unlike chlorine, which produces chloramines, responsible for “chlorine odours” and eye and skin irritation).

At the touch of a button the Helsinki can deliver an intense full-body massage that will help to relax your muscles and lower your stress levels. With hot tubs, cleanliness is king, and this should be your number one priority so that people don’t fall seriously ill after going in the water.

If you do use a bromine floater, it's fine to take it out while you're using the spa if you find it gets in the way. In this case, shock needs to be added to release the sanitizer again and make it effective in killing bacteria. However, this has its own risks as not enough chlorine could be dissolving into the water as needed.

Suitable for up to 7 adults, the Helsinki AirJet’s spacious surroundings can be enjoyed by you, your friends and your family.Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC, authorised and regulated by the Financial Conduct Authority. The benefit of this is that there is chlorine being dispensed constantly, however it does give less control than using granules. You MUST NOT run the spa for long periods without the filters, so fit a spare set immediately when you remove the existing ones for cleaning. Unfortunately, there’s no simple answer to this question: it will depend on your own body and the convenience you’re seeking.