they dont need to be run 24/7 in all cases
depending on the size ( power) of the uv unit you can calculate the hours on and off to provide the level of protection you want
also you can figure out if the unit is too small and a waste.......
see escobal's book ( Aquatic Systems Engineering: Devices and How They Function)
depending on the size ( power) of the uv unit you can calculate the hours on and off to provide the level of protection you want
also you can figure out if the unit is too small and a waste.......
see escobal's book ( Aquatic Systems Engineering: Devices and How They Function)