Anytime fish are cultured and farmed, it is crowded and they become stressed. Crowded conditions will degrade water quality and increase transmission of pathogens. Such stress decreases the immune response which in return renders them more susceptible to disease. This is a dangerous combination that can lead to disease and massive fish kills in all culture situations. In recirculation systems, fish are often crowded in traditional aquaculture and water quality can quickly change for the worse. One way to minimize disease outbreaks is to disinfect the system water using UV treatment.
UV treatment in aquaculture addresses: