Turn off the UV lamp if the room is occupied. The UV sterilizer for aquariums must be turned on and running 24 hours a day, every day. The exceptions would be to install the tank before there are fish in it, adding beneficial bacteria to the water, since UV light kills bacteria, or if you use a medication that stipulates that UV rays must be turned off. It's best to leave the UV light on for about 10 to 12 hours a day. This can help establish a fixed routine for the fish and give them time to rest.
UV sterilizers will come with a UV bulb. Most UV bulbs will last 12 to 14 months. In fact, the skin can damage the UV bulb, so it is strongly recommended that you wear gloves when handling it. Some marine breeders like to use UV rays intermittently to allow phytoplankton and zooplankton to feed and travel through the system without being eliminated, but this also allows parasites to do the same, so there is no point in installing a UV in the system to help protect fish from parasites with free swimming stages.
Last but not least, if you're treating sick fish or treating water with chemicals, consider turning off the UV light so that its effect doesn't alter other processes. Humans shouldn't look directly into UV light, so make sure everything is installed and ready to work before turning it on. If the ultraviolet or UV system is used seasonally, for example for 6 months this year, and then emptied and unplugged, you can use it for next year's season for another 6 months before having to replace the lamp for a spare one. There are also some additional features, depending on how much money you're willing to spend on your UV light.
Despite rumors and other things you may read on the Internet, as long as UV light is used correctly and cautiously, it will NOT harm you, your fish or any invertebrates you have in the aquarium. Ultraviolet light, also known as UV sterilizers, is a tool used in the filtration system of a fish tank. Maintaining a UV light is no more difficult or different from that of an aquarium's filtration system. Your normal lighting system is similar to your home lighting (although LED is also becoming popular), and there's UV lighting.
There are some types of UV lights that are integrated into the filtration system and there are others that can be easily connected to the filter. Choosing the best UV light for your aquarium is no easy task, as the market is full of different products. The design of UV light is normally a device that looks like a tube that has an inflow and outflow. Therefore, if you want to minimize the effect of UV light on beneficial bacteria, be sure to keep the installation away from most surfaces.