Hmmm, this is a very debatable subject. I personally do not feel that UV
's are necessary in a well maintained aquarium, where quarantine is the first line of defense. I do however, acknowledge the fact that uv
's may be useful to the hobbiest in some instances. I would recommend a UV
that takes water from the tank and replaces it back to the tank with a very slow flow rate, maybe one to 2 tank volumes per hour. In a closed loop type thing. Brands that I like and have heard good things about are Emperor Aquatics and Rainbow Lifegard. I would recommend a wattage of 25W or higher, with the understanding that at that slow of a flow rate, it will likely be a large heat source for your tank.