Simon Goddek‘s and Boris Delaide‘s publication in the peer review journal ‘Sustainability’ summarizes the challenges of “aquaponics”, that is combining fish production (aquaculture) and out-of-ground crop production (hydroponics), in particular nutrient recycling advantages and knowledge gaps concerning nutrient forms and flows. Hydroponic systems allow precision controlled dosage of both water and nutrients (macronutrients, in particular N, P and K, and micronutrients) to crops, as a function of their growth and needs. This is more difficult in aquaponics, where the nutrient supply is a function of the fish production. Nutrients and micro-nutrients therefore should be monitored and supplemented where necessary for plant needs. Read more