11-14-2009, 08:47 AM
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I have very little experience with planted aquariums, but I have over a decade experience with UV's on multiple aquarium applications. There is a ton of bad information floating around on the internet, from people posting their opinions about UV's, despite having never used a UV and often never even seeing an aquarium with a UV on it.
For that reason, I thought i'd chime in.
I have had wonderful experience with UV's as a preventative for the spread of disease. Especially in aquariums where new fish and plants are still being added, or live rock being added in marine systems. Each time you introduce new life you are potentially introducing new pathogens and potential disease. The UV may not kill the disease on the fish, but it does serve 2 functions. First, it kills the water born pathogens assisting in the prevention of your entire livestock being at risk. Second, and equally important in my opinion, is that the UV helps to prevent secondary infections from opportunistic pathogens that may otherwise have been in your system.
I highly support the use of UV's on any aquarium which is still in the stocking phase.