What is an Ultraviolet (UV) Pool Sanitizer?
Ultraviolet (UV) pool sanitizers utilize a cutting-edge, non-chemical process that uses germicidal UV light rays to sanitize water, air and surfaces that may be contaminated. Ultraviolet pool sanitizers emit a high intensity germicidal light ray that alters or disrupts the DNA or RNA of targeted organisms such as algae, bacteria, viruses, cysts and protozoa. The highly concentrated electromagnetic energy also destroys organic matter, eliminating the formation of dangerous chlorine by-products.

What does a UV sterilizer do?
A UV sterilizer is used to control infections by stopping the spread of microorganisms from one fish/coral/invertebrate to another through the water. It is also used in pond applications to control free-floating algae. When operated correctly, free-floating microorganisms will be killed by the UV light. Note that the organisms must be in the water that flows to the UV sterilizer. The UV light has no residual effect and will not kill organisms attached to fish (e.g., adult stage of ich) or rocks (e.g., algae). 
 
How do UV sterilizers work?
The UV sterilizer utilizes a germicidal fluorescent lamp that produces light at a wavelength of approximately 254 nanometers (2537 Angstroms). The water with the bacteria/algae passes over the bulb (or around the bulb if a quartz sleeve is used) and is irradiated with this wavelength. As the light penetrates the bacteria/algae, it mutates the DNA (genetic material), preventing growth/multiplication of the organism.


How Ultraviolet Sanitizers Work
SpectraLight is installed in-line just after your pools existing filtration system. SpectraLight bombards the passing water flow with a high intensity germicidal ultraviolet ray that destroys more than 60 waterborne pathogens, including algae, bacteria, cysts, and viruses. The UV sanitizing lamp is housed in an industrial graphite housing optimized for high flow rates. A highly specialized quartz glass sleeve protects the lamp from passing water while transmitting 99.9% of the UV light. The highly concentrated electromagnetic energy destroys organic matter and eliminates the formation of dangerous chlorine by-products called chloramines that commonly lead to red, stinging eyes, skin irritations, asthma and allergies. This energy penetrates the cell walls of bacteria, viruses, algae, cysts and all pathogens. That's right: no pathogen can escape a powerful dose of UV from a SpectraLight sterilizer.
 
Application
1.Food processing industry, including juices, milk, drinks, beer, practical oil  and canned food.
2.Electronic industry.
3.Hospitals, various laboratory and high levels of pathogenic body water disinfection.
4.Households building, residential, office buildings, hotels, restaurants, water factories.
5.Purification and disinfection of shellfish, fish cleaning and disinfection
6.Military camp, field water supply system
7.Urban wastewater disinfection.
8.Swimming pool, other recreational water disinfection 
9.Thermal power, nuclear power plant  industrial, central air conditioning system cooling water.
10.Biological, chemical and pharmaceutical, cosmetics for the production of cooling water.
11.Sea water, fresh water breeding, aquaculture  water
12.Agricultural water disinfection

 
Water Quality (in)
Water quality plays a major role in the transmission of germicidal UV rays. It is recommended that the water does not exceed following maximum concentration levels
 
Effectively treating water with higher concentration levels than listed above can be accomplished, but may require added measures to improve water quality to treatable levels. If, for any reason, it is believed the UV transmission is not satisfactory, contact the factory.
UV wavelength (nm)
 
                 DOSAGE is the product of intensity & time
dosage=intensity*time=micro watt/cm2*time=microwatt-seconds per square centimeter
                              (μW-s/cm2)
               Note:1000μW-s/cm2=1mj/cm2(milli-joule/cm2)
  Facts you should know 

Chloramines (residual chlorine)  is the smell you get from chlorine
Chloramines is the cause of eye and skin irritation  
Chloramines is the cause of composite building structure corrosion.
No microbe can immunize it's self against UV rays even those pathogens that cannot be killed by chlorination.
The adverse impact of pool chemicals, especially to children, is 5 times greater than passive smoking Product and installation costs of Ultraviolet water sterilisation reactors will depending on pool size and site location.