Installation and Operation Directions for AquaZone Ozonizers 50/100/200:
- Connect your air pump to the (IN) air tube connection on the back panel of the ozonizer. Connect the (OUT) air tube connection to the ozone reactor or protein skimmer (it is advisable to install an ozone-safe check valve).
- Switch on your air pump and check to see that air is flowing freely through the unit.
- Set the ozone output to the desired level. As a general rule of thumb, inject between 5 and 15 mg/hr ozone for every 25 gallons of aquarium water. The scale is set as a percentage of the maximum output of 50, 100, or 200 mg/hr according to the model purchased.
Ozone Output level in mg/hr
| Model |
5% |
25% |
50% |
75% |
100% |
| 50 |
2.5 |
12.5 |
25 |
37.5 |
50 |
| 100 |
5 |
25 |
50 |
75 |
100 |
| 200 |
10 |
50 |
100 |
150 |
200 |
- Plug the DC jack into the back of the ozonizer unit and the AC Adapter to a wall mounted electrical outlet.
- The red light on the front panel indicates that the unit is generating ozone, however, it will only be effective if air is forced through the unit.
- It is recommended to use the AquaZone Ozonizer together with a Redox Controller.
The Relationship between Ozone use and Redox Potential
As ozone is applied to aquarium water it will raise the oxygen level and break down organic wastes (i.e. sterilizing the water thus raising the Redox potential). Since too high a Redox potential is as undesirable as a low Redox potential, it is advisable to keep the Redox potential stable. Apply ozone when the Redox potential is lower than the desired value and switch off the ozone when the upper limit of the Redox potential has been reached.
This can be achieved by combining a Redox controller with the AquaZone Ozonizer unit. If ozone is to be applied without the benefit of a Redox controller, the dosage should be set at a low value so as to prevent too high a Redox potential forming in the aquarium.
Special Instructions and Safety Precautions for using Ozone
- Ozonized air should be prevented from escaping into the room. It is advisable to install a carbon filter on your protein skimmer or ozone reactor where ozonized air escapes.
- Do NOT let the Redox value exceed 400 mV as harmful substances can be produced, which could damage sensitive organisms. The aquarium inhabitants should be protected from exposure to free ozone and/or harmful oxidation products. The recommended method to remove any residual free ozone and any free oxidation products is by vigorous aeration followed by filtration through activated carbon. After this treatment, the amount of residual ozone should be checked regularly - maximum 0.05 mg per liter.
- Ozone production is affected by the humidity and dust content of the air, supply. Use of an Air Dryer will ensure a consistent ozone output and longer equipment life. Strictly follow the manufacturer's directions in servicing dryer media.
- All air tube connections should be secured tightly to help contain ozone.
- The AquaZone Ozonizer should be installed above the aquarium. This prevents water from siphoning back into the unit in the event of a power failure. If the unit is located below the water line of your aquarium, an ozone-safe check valve should be installed to the air line tube between the ozonizer and the ozone reactor/protein skimmer.
- Ozone treated water should not flow back into the biological wet/dry filter since the nitrifying bacteria are extremely sensitive to residual ozone. Even amounts less than 0.005 mg per liter can adversely affect your filter bed.
General Information
Features:
- Complete range (50, 100, or 200 mg/hr) variable output
- Utilizes high frequency switching technology
- Designed for use in a humid environment
- No regular maintenance required
- Interface with all Redox (ORP) Controllers
Tech Notes:
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 oxidation capacity of the 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 an Ozone Monitor/Controller is used to determine when ozone should be applied.
FAQs: An Introduction to Ozone & Redox Potential
Information from Red Sea Manufacturer
Q. What is Ozone?
A. Through an electrical discharge in air, three oxygen molecules can combine to form two ozone (O3) molecules. For example, in nature, this happens in a thunderstorm by the action of lightning. Ozone can be made artificially on a small scale through electrical discharges inside an ozone generator. Ozone is a very unstable combination, which will be oxidized by this reaction. Ozone is, therefore, a very strong oxidizer.
Q. What can Ozone do for the Aquarium?
A. Due to its oxidizing capabilities, ozone can break down harmful waste products produced by fish. In a marine aquarium (or in a freshwater aquarium with pH higher than 7.5), ammonia is efficiently oxidized to less harmful nitrite and further to nitrate. Bacteria in a biological filter can also perform this oxidation reaction, however, it is advantageous to install an ozonizer as a backup to prevent dangerously high ammonia levels. This backup function is especially important in aquaria with a lot of fish, and subsequently, a lot of waste.
Complex organic wastes such as the substances that turn the water yellow cannot be removed by biological or mechanical filtration. Ozone, however, breaks up their structure, so that the fragments can be cleared up by the filter's bacteria or through protein skimming. The use of ozone leads to "crystal clear" water.
Another important property of ozone is its sterilizing ability. Harmful bacteria and other possible pathogens that float in the water are efficiently killed by ozone. In the sea, the amount of floating bacteria is always very low, due to the antiseptic action of natural sea water. In the aquarium, however, bacteria that can be harmful to many aquarium inhabitants, especially fish larvae, find a favorable environment for rapid reproduction. The term "sterilizing" should not be taken too literally. The amount of ozone administered should be just enough to kill only surplus bacteria. Totally sterile water is just as harmful to fish and invertebrates.
Ozone should never be introduced directly to the aquarium water: it must be administered through an isolated chamber like a pressurized ozone reactor or a protein skimmer. Connecting the ozonizer to an air-driven internal filter can ozonize a freshwater aquarium.
Q. How much Ozone should be used?
A. The ideal amount of ozone will vary for each aquarium. The right amount is dependent on a number of factors: the volume of water, the water flow rate, the ozonized air flow rate, the amount of dissolved organic matter, the fish density, the type of biological filtration, and additional equipment in use.
As a guideline, ozone production should be between 5 and 15 mg/hr per 25 gallon (100 liters) of aquarium water. Aquaria densely populated with fish need more ozone input than invertebrate aquariums where far less waste products are produced. Small reef aquaria (few fish, many invertebrates) can be successfully maintained with less than 5 mg/hr/25 gallons. Ozone in excess of 15 mg/hr/25 gallons should be used with extreme caution and only, for example, in aquariums densely populated with fish and no invertebrates.
Q. What is Redox (ORP) Potential?
A. In every chemical reaction, electrons are transferred from one substance to another. The substance that receives electrons is said to have been oxidized, while the one that loses electrons is said to have been reduced. In freshwater and sea water, many of these so called Redox reactions occur simultaneously. Because of the constant exchange of electrons, the amount of prevailing oxidative or reductive reaction can be measured as a voltage, by means of a platinum electrode and a volt meter. This millivoltage (mV) is called the Redox potential, also called the ORP (Oxidation Reduction Potential).
The higher the Redox potential, the greater the oxidizing capacity of the water. Redox potential values of between 300 and 350 mV (recommended as the desirable level) indicate an oxygen rich environment with a low waste material content. The Redox potential can therefore be used as an indication of the quality of your aquarium environment. Some authorities advise maintaining a Redox potential of 400 mV or even higher.
Be extremely careful with high Redox levels: values higher than 430 mV can be dangerous, values of 600 mV will cause increased levels of sterilization which should not even be considered for aquarium use. Values below 200 mV indicate an accumulation of organic wastes and a low oxygen level. Negative Redox potentials are also possible indicating anaerobic conditions, which can occur, for example, under the bottom gravel.
| 
 "AquaZone Ozonizers")
Break down harmful organic waste products naturally with ozone. Applying ozone to your aquarium increases oxygen levels, decreases dissolved wastes, and effectively kills numerous harmful pathogens. AquaZone Ozonizer uses corona discharge technology to provide higher ozone concentration than UV bulb style ozonizers. Features an easy-to-adjust variable ozone output - just dial in the amount of ozone your aquarium needs. Available in 50, 100, 200 mg/hr variable output ozonizers to help improve water quality in fresh or saltwater aquariums of all sizes.
