Aquaponics has
several advantages over other recirculating aquaculture systems
and hydroponic systems that use inorganic nutrient solutionsThe hydroponic component serves as a biofilter, and therefore a separate biofilter is not needed as in other recirculating systemsAquaponic systems have the only biofilter that generates income,which is obtained from the sale of hydroponic produce such as vegetables, herbs and flowers (Rakocy and Hargreaves, 1993). Fish feed provides most of the nutrients required for plant growth.Majority of fish species utilize 20–30% of nitrogen (N) supplied
by the diet (Penczak et al., 1982; Hall et al., 1992; Shpigel et al.,