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Ultraviolet radiation, referred to as UV or UVC irradiation for sterilization purposes is a form of ionizing and non-ionizing radiation.
UV light energy is classified as such: UVA 400 nm - 320 nm, UVB 320 nm - 290 nm, and UVC 290 nm - 100 nm. The frequency the photons vibrate at determines the color/wavelength of the light.
This of course is a simplification, so please read the ENTIRE article along with cited references for a better understanding so as to make a more educated decision of whether a true high dwell time UV Sterilizer is for you or maybe just a Clarifier or nothing at all!
A Little Background: I started using UV Sterilizers in 1977 (I have been in the hobby since 1968), and started experimenting with these devices in 1978.
I also have read much research, including research outside the often anecdotal aquarium keeping hobby, which often explained results I was getting in some experiments in the 1990s that explained the role in Redox and UVC and how True UV Sterilizers can lower oxidative stress.
One way I measured results in testing specific UV devices was to use a murky slurry of water with bacteria grown from decomposing fish food and back yard dirt, and then time how long certain UV devices would clear the the aquarium this was added too.
The graph expresses the annual evolution of the frequency of use of the word «womanizer» during the past 500 years.
Using Potassium Permanganate, which is an oxidizer in both a control tank (left tank) and one utilizing an AAP Compact UV with a HO UVC Lamp (right tank).
As Potassium Permanganate is reduced, it goes from red to brown to clear.
It is easy to see that the UV Sterilizer tank goes through these stages well ahead of the control tank.
La Corte Civil y Mercantil de Arbitraje (CIMA), única corte privada española de arbitraje y Tirant lo Blanch, la editorial jurídica más prestigiosa de España según el Scholarly Publishers Indicators (SPI), han suscrito una alianza estratégica para la colaboración y trabajo conjunto de las dos entidades, en la promoción, difusión y desarrollo de la institución del arbitraje en España y Latinoamérica.
(4) Effect of UV Sterilization on minerals, chemicals, etc.