I've been debating with myself about whether or not I want to use a UV sterilizer in my breeding setup. I will have most everything centrally filtered through a largish sump system. The cost of the UV sterilizer is not the issue, if it would definitely be the best thing to do for my fish I'm all for it.
However, while researching on the Internet about UV sterilization, I came across several people who felt that using UV in a breeder setup where the fish are being sold out to pet stores and/or individual users can do more harm than good. The reasoning behind this is that UV usage causes a more "sterile" environment and therefore inhibits the natural immune systems fish develop as they are exposed to various bacteria or whatever. Then when these same "protected" fish are moved into another system that isn't protected by UV, they are more susceptible to diseases. That reasoning seemed to make sense to me and made me think twice about using UV at all. Is there anything to this? or is it all just someone making excuses not to have to use UV?
Thanks for any input!
However, while researching on the Internet about UV sterilization, I came across several people who felt that using UV in a breeder setup where the fish are being sold out to pet stores and/or individual users can do more harm than good. The reasoning behind this is that UV usage causes a more "sterile" environment and therefore inhibits the natural immune systems fish develop as they are exposed to various bacteria or whatever. Then when these same "protected" fish are moved into another system that isn't protected by UV, they are more susceptible to diseases. That reasoning seemed to make sense to me and made me think twice about using UV at all. Is there anything to this? or is it all just someone making excuses not to have to use UV?

Thanks for any input!