Farm automatically outputs fish when there is a request in the logistics network for them. In order to start, it will request Bioflux, store some of the Nutrients in order to self-start itself later, and when it's generated the Fish, it will purge out any spare Bioflux.
After 1h50m has passed, it will automatically run a Fish production cycle in order to refresh the fish in the biochamber so they don't spoil.