I love these internal UV filters for reducing disease in my aquariums, everyones fish have some cooties and when you bring in fish from other people they will have cooties as well.
A simple way to reduce (not elliminate the breakout of cooties to use a simple UV filter).
A 5-watt UV sterilizer in an aquarium is effective in reducing parasites.
It works by emitting ultraviolet light that disrupts the DNA of microorganisms like parasites, preventing them from reproducing. This reduces the parasite load in the water, helping to keep fish healthy. UV sterilizers also contribute to clearer water by targeting other harmful organisms like bacteria and algae. Overall, they offer a chemical-free method of improving water quality and reducing the risk of parasite outbreaks in aquariums.