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UV Clarifiers make use of quality Germicidal lamps with a specification wavelength of 254nm (nanometers) - also known as UV-C or short-wave. This range is proven (and accepted in all circles) to be the most effective in germicidal applications, and is used in many industrial application for disinfecting contaminants that pollute both air and water. Such achievement are made in that when living microorganisms or organic material is subjected to short-wave ultra violet light in the spectrum range of 240nm to 280nm the DNA structure of the substance is broken down and thus technically destroyed.
Whilst it is scientifically correct that UV-C at 254nm is capable of destroying biological contaminants such as mould, fungus, bacteria and viruses, this is sadly directly related to exposure time - with that exacting time being paramount to the process. Alas if by example we were to evaluate a hypothetical setup of say a 3,000 gallon pond served by a single 55 watt UV unit with a through flow rate of 1,500 gallons per hour the end result is that not enough contact time/exposure has been provided in order to destroy 100% of detrimental bacteria/organisms. It may well be the case that 10% are destroyed, but that is no great asset especially when that amount might have died or disappeared on their own accord a few hours later.
The life form of single cell pond algae’s (which form green water) are such that they only need to be in contact with ultra violet UV-C for a very short exposure time in order to be destroyed, and this is why the majority of UV Clarifiers on the market are successful in varying degrees.
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