UV sterilizers can be used with any aquarium, but in smaller aquariums (less than 108L), the cost of this device may make it impractical. UV sterilizers are cost-effective in a shared filter multi tank system. In the single tank system, the germicidal lamp is beneficial to control the spread of infectious diseases. For establishing a new aquarium, as 98% of enthusiasts do not use quarantined water, it is particularly important for disease control in the aquarium.
UV disinfection is one of the most suitable ways to control free floating algae in ponds, which is of great help to fish growth. UV disinfectors will also kill bacteria that float freely in pond water.

What are the limitations and potential harmful side effects of UV disinfection?
Is UV sterilizer a good alternative for biological and mechanical filtration, regular water changes, and appropriate control of nitrogen circulation. A UV sterilizer should be considered as a form of insurance.
UV sterilization is ineffective against algae or other pathogenic organisms that do not swim freely in water.
UV disinfectors usually cause harm to many organisms and should not be used in the secondary circulation water of aquariums, as they should not be used before entering biological media or crushed stones??, May kill beneficial bacteria.
Many drugs can undergo UV light denaturation, so disinfectors should be turned off when using drugs, especially when dealing with copper. UV light will "break" the chelating agent's effect, potentially causing metal ions to reach lethal concentrations.
UV disinfectors can be used to control parasites, but require very slow flow rates, which may be impractical in larger aquariums unless a large (40W) UV system is used.
When it can heat water through UV disinfection, especially if the unit is a cooling device larger than the required tank size, it may be necessary to keep the water in the aquarium at the appropriate temperature.