Product Features:

Red Sea AquaZone Deluxe 50 - 50mg/hr Ozonizer/Controller + Probe & Air Drier 250

Ozone Generator with built-in Redox Controller
Ozone is a natural purifying agent made up of an unstable form of oxygen and is a very strong oxidizer. The ORP (Oxidation, Reduction Potential or Redox) is a measure of the oxidization capacity of water. A low ORP indicates a high (and undesirable) level of organic matter in the water. Excessive ozone will affect the delicate chemical composition of seawater. Therefore, it is preferable if the ORP is monitored and used to determine when ozone should be applied.  
The complete solution for the effective and safe ozonization of aquariums.
Includes all of the features of the AquaZone variable output ozonizers with the following added features:

• Automatically controls the flow of ozone according to a pre -set ORP
• Easy to read backlit digital display
• Easy adjustment of ozone output and desired ORP
• Continuous display of current ORP
• Safe and easy to use.
• Includes 250cc Air Drier

Unit comes with a One year warranty from manufacturer