Dr Joe;637847; said:uv sterilizers on a FW tank are nice, but by no means needed or gonna do anything special.
No offense, but you need to find more knowledgeable people to get your info from and stay away from who ever gave you this tidbit. Do a search on here to get a better idea of how things really work.
already said and done, it was one of the part time helpers...I just wanted to share my experience when asking this question..and some of the large (petsmart/petcos said the same thing)..
and then a few months later I moved about 2 hours away...lol