5 How long is the UV lamp on every day?
Remember, the UV light does not need to be on all the time, on the one hand, it consumes electricity, on the other hand, it is not good to sterilize the whole aquarium water, after all, the opposite is true. The main purpose is to kill some microorganisms and bacteria that are harmful to ornamental fish, and play a protective role. If the fish are healthy, and the tank water quality is also relatively good, in fact, UV light can also be opened, or open a 1-2 times a week, each time open a half hour to an hour on it.
Of course, the UV light should be used with a large tank, if the tank itself is small, then the UV light is not a good sterilization effect, small tank through fixed water changes to control the number of bacteria will be more effective.
Last but not least, UV light is only to help sterilization effect, not UV light on, the entire tank water can reach the “sterile” state.