For the best functioning of the unit, we recommend to always keep the unit plugged in and switched on. When there is no water to filter, the unit stays in a standby mode, so there is no need to manually turn it off.
After the filtration process is over, always make sure to empty the residual water from the tap water tank and refill it with fresh tap water, then place the tank back on the unit. For best filtration performance, and to reduce scale build up in your tap water tank, it's always best to keep water circulating through the unit.
Additionally, AquaTru can only actively track filter life when the unit is plugged in. Unplugging your unit will not any reset filter tracking, but it will simply pause the tracking and will continue tracking from where it left off when plugged back in.