There is no such thing as a chemical-free hot tub! But, you can choose sanitising options that minimise your chemical use and that will be kind to both your skin and the environment.
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WHY DO I NEED CHEMICALS?
You can leave the water in a hard sided hot tub for up to 12 weeks and in an inflatable hot tub for 3 - 4 weeks before you need to change it, so obviously you will need to treat the water to keep it clean and safe to use. Enzymes alone, seaweed or any of the many other wacky options that come and go cannot kill resilient and harmful bacteria, such as legionella, that will develop in the water if it is not treated properly.
WHAT DO I NEED TO DO?
It"s easy! There are only three things that you will need to do.1. SanitizeFirst and most importantly you need to sanitize the water to stop potentially dangerous bacteria growing. Correct santitizing will also stop the growth of algae. There are many different sanitizers to choose from, ranging from chlorine through to silver. The two options that are kindest on the skin and the environment are the ecoONE system and Aquagarde. Compare the options available here.2. FilterSecondly you need to ensure that all debris and significantly sized particles are removed from the water. This function is performed by the hot tub filter that must be changed and cleaned regularly to ensure that it performs properly. Any particles of organic matter that are not filtered out of the water will decay and quickly cause a degredation in water quality. You can read more about cleaning hot tub filters here.3. ShockFinally, you will need to remove any dissolved contaminants from your water (perspiration, grease, body lotions, make-up, hair care products etc etc) by using a hot tub shock product. If you don"t do this the water will become dull, discoloured and foamy. By far the best shock product available, for use with any sanitizing regime, is surespa spa shock express.