It kills "good guys" as well as bad. These beneficial microbes are absolutely necessary in almost all captive environments. Organisms maintained in a "well-filtered", strongly U.V. sterilized system seem to develop a type of acquired immune deficiency syndrome. Like the boy-in-a-bubble, organisms kept in an almost sterile environment seem to lose their ability to ward off infectious diseases. Now, let me explain the qualifiers placed upon the terms above. A) There are no captive systems that result in 100% effective kill of all micro-organisms. B) This loss of apparent immunity occurs over long periods of time in a highly variable, non-selective manner.
Cincy Reefer did you even read before you typed? When did I say there are no positives or more negitives? So you can play again there, and try to read more on a subject before jumping into a big boy conversation
Find a bad response that I made there! Here Ill post it for you, ok
I posted:
"As for a UV piece in a saltwater tank I disagree completly the uv scanner kills the bateria in the tank (the bad which is good, but the good bac which is bad)."
Tony Detroit posted:
"gringoloco-
I believe your information is incorrect on the UV. If it is correct please post a link to your source."
So I dont believe in them because they destroy the good stuff in the tank, which is critical for a home tank to survive, so that my choice as to why I wont use one. So what exactly are you talking about, maybe you need to sit down and read, conprehend what you read, and then type. Obviousally you dont understand anything I wrote. If I sound rude to you, well im a little perked that you just jump into a conversation and start pointing fingers telling me im wrong, and i should use one. When I pointed detroit to a source document that specifically points to in there the exact statement ive made which is what he had asked for. So for you jumping to quick, no cookie for you. Go pass go do not collect $200 and go to jail for lack of understanding!
