If looking for a low clor system patented Eco Pur filters are perfect with a functioning CD Ozone unit.
Cheap and effective, while Eco Pur technology is the best available for hot tubs and cuts chlorine to a minimum,
but all “systems” do require a residual sanitiser, granular chlorine being ideal. If concerned about Bio Film,
flush out your pipe work with Hot Tub Flush.
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