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Pool ionisation is an effective way to sanitise pool water without the use of (harsh) chemicals. Many people in today's eco-conscious society prefer to swim in chlorine-free water for a variety of health and economical reasons. Chemical free swimming is also a safe and preferred solution for families who have children with allergies, eczema or asthma. NASA was the first to use ionisation for water treatment in the NASA Space Shuttle in the 1960's and Bionizer has refined and adapted this space technology for eco-friendly pool sanitisation.