What kind of water can be used im the hydrogen oxygen inhaler machine? With 3000ml hydrogen inhaler unithow long will 4 liter water tan last before it has to be replaced?

Distilled water (TDS=0) or purified water is required.

If you use it frequently, you don't need to change the water because inside we use new upgraded technology: anti-bacterial clean+UV disinfection system, say goodbye to the trouble of changing water.

If you don't use it for more than 14 days, please drain the water and add new water.

Consume 130 to 150ml of purified or distilled water per hour.

When the water tank is filled with about 4 liters, it will stop automatically adding water. If it consumes 1.5 liters, it will prompt a water shortage, and water needs to be added to start. The water tank needs to retain 2.5 liters of water to protect the machine. Therefore, starting from the second water addition, when the water is not emptied and refilled, all Just add 1.5 liters, the machine will also prompt that the water is full and automatically stop adding water.