Water sanitisation is very important in hot tubs, as many organisms thrive in a warm, wet environment. Maintaining the hot tub water chemistry is also necessary for proper sanitisation and to prevent damage to the hot tub.
Important: Most hot tub manufacturers can avoid replacing defective parts under warranty if they can prove that unbalanced water has caused the fault.
Effective water sanitisers include Chlorine (Industry standard for hot tub showrooms, health clubs, gyms etc.), Bromine and Active Oxygen systems.