Saga Shipholding said it has completed installing ballast water gear for its entire fleet of 32 open-hatch bulkers.

The Norwegian owner is using gear from Stavanger-based Optimarin, whose ballast water treatment system won the coveted US Coast Guard type approval last December. Optimarin's system primarily uses ultraviolet light to kill invasive species.

The 56,000-dwt Saga Future (built 2012) was the first to get the Optimarin system in 2012.