Is your hot tub installed in a "holiday let" setting?: In accordance with Health and Safety Guidelines (HSG282), a domestic hot tub used in rented accommodation including holiday lets, homes, parks, lodges, chalets, cottages, caravans, etc should be disinfected using Bromine or Chlorine through the use of an inline continuous disinfection feeder. Help! I'm not sure if this filter is the right one to fit? Don't worry! Our filter finder will help you to identify which filter you need and furthermore delivery is free! Download the Darlly Sanistream User Guide .