We observed an increase in the concentration of reactive phosphorus in the molasses group ( Table 1 ). This difference
may be associated with the low assimilation of reactive phosphorous into predominantly heterotrophic environments, unlike
systems dominated by phytoplankton, into which reactive phosphorous is readily assimilated ( Hargreaves, 2006 ). Furthermore, phosphorous was present in the molasses that
was added daily to the molasses group for ammonia control.
The phosphorous content of molasses total dry matter varies between 0.07% and 0.74% ( OECD, 2011 ).