Water quality studied in closed-system salmon aquaculture


Ozone is a strong oxidant commonly used for improving water quality and disinfecting pathogens in freshwater fish farms, according to Nofima, an applied research institute in Norway. However, when ozone reacts with certain constituents of seawater, toxic byproducts can severely affect the health of fish populations.

As brackish water is increasingly introduced in farming post-smolt salmon, thresholds for the safe use of ozone need to be established. Suppliers of recirculating aquaculture systems (RAS) are looking for safe, cost-efficient and reliable ways to maintain optimal water quality in brackish water RAS, and with this research, they are now a step closer, Nofima said.