It is possible to use the same water for a longer period if a filter system is installed to the tub. We also offer a cabinet for filter system which protects the system against cold on winter. It is possible to install an electric heater (3 or 6 kW) to the same circulation with the filter system in order to keep the water temperature on a certain level.
Filter system will be delivered separately in manufacturer’s package and needs to be installed according to the installation manual.
This video will show you how to use the filter system
You will find the instructions here:
Installation and User Manual