Facts About Ultra Violet Light In Ponds

Ultraviolet light takes full control of green pond algae. That is all it does but it does it extremely well and with total reliability. No fish pond should be without an uv clarifier. No more pea soup fish ponds. The power of uv pond filters as some people call it or rather ultraviolet light as it is more accurately known is a real advantage for the pond keeper. Blue ultraviolet light is generated at a particular wavelength. It is a natural phenomenon and is one of the reasons we get sunburned on the beach.

At 40 degrees C (104 deg F) efficiency of UV is highest. At 20 degrees is it 50% efficient only. If water is in contact directly with lamp then this means temperature at which uv is working is at the water temperature.

This is why a uv sterilizer quartz tube is so important ... it insulates the lamp against cold temperature so efficiency can be high.

Have you ever thought why we dont get sunburned from uv in the home behind glass windows? It is because ultraviolet light is not transmitted through glass. It is fully transmitted through quartz however and this principle is used in designing aqua ultraviolet units or uv clarifiers for use in ponds.

Other names for ultra violet systems are uv filters for ponds or uv pond lights and so on. Even the term uv water purifier is used.

This is how an ultraviolet light works in a garden fish pond.

Water is pumped through a quartz tube. In this way the pond water does not come into direct contact with the ultra violet source which is a miniature version of a fluorescent-type tube. This is important because uv light intensity is optimum at 40 degrees centigrade. If water impinged directly on the lamp the efficiency of the ultraviolet light unit would be reduced dramatically because the temperature would then be lowered. Some units do not have quartz tubes fitted beware of these units. You must assume them to be 50% efficient only.

As water flows through the quartz tube ultra violet rays penetrate the water by direct incidence or via highly reflective metal surfaces. These ultra violet rays damage the cells walls of any pond algae circulating in the water (not any other type of green pond algae). In becoming damaged the green algae cells clump together and thus become much bigger than the 4 microns diameter as individual cells. The green algae is then able to be filtered out in the biofilter.

The ultraviolet light does not damage anything else in the pond environment. If the unit is designed to match the pond you can be absolutely sure of success and no more green water. Ultra violet or uv is all you need for success and no more green water.

Ultra violet light clarifiers (UVC) or sterilizers for ponds

Will

Will NOT

Ensure pond algae control by killing any algae in fish ponds exposed directly to the uv rays - ie those pond algae circulating in the pond water

Kill any pond algae in fish ponds not exposed directly to the uv rays eg blanketweed, or pond algae in fish ponds attached to pond surfaces

Do the best job of clearing algae in fish ponds when designed to cope with the system installed for pond algae control

Kill bacteria or viruses - only fish pond algae. The design is such that pond units cannot reach sufficiently high radiation levels. Sterilisation uv units are required for this purpose.

Provide clear water when designed and installed correctly without any doubt so long as murkiness is due to presence of algae in fish ponds.

Normally effect medication so does not have to be switched off during treatment

QUITE SIMPLY will do a great job of pond algae control

Do any harm to plants, fish or filter bacteria needed for efficient nitrogen cycle functioning. Only fish pond algae is affected.

Garden Fish Pond Keeping Articles To Explore

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Facts About Ultra Violet Light In Ponds

This is how an ultraviolet light works in a garden fish pond.

Garden Fish Pond Keeping Articles To Explore

Ultra violet light clarifiers (UVC) or sterilizers for ponds
Will	Will NOT
Ensure pond algae control by killing any algae in fish ponds exposed directly to the uv rays - ie those pond algae circulating in the pond water	Kill any pond algae in fish ponds not exposed directly to the uv rays eg blanketweed, or pond algae in fish ponds attached to pond surfaces
Do the best job of clearing algae in fish ponds when designed to cope with the system installed for pond algae control	Kill bacteria or viruses - only fish pond algae. The design is such that pond units cannot reach sufficiently high radiation levels. Sterilisation uv units are required for this purpose.
Provide clear water when designed and installed correctly without any doubt so long as murkiness is due to presence of algae in fish ponds.	Normally effect medication so does not have to be switched off during treatment
QUITE SIMPLY will do a great job of pond algae control	Do any harm to plants, fish or filter bacteria needed for efficient nitrogen cycle functioning. Only fish pond algae is affected.