Aquaponics : integrating hydroponics with aquaculture

Abstract

Aquaponics is a modem alternative method of food production that has a rich history rooted in ancient times. It is not well established in Malta, but has been studied and is being improved internationally. It provides both plants and fish for consumption from one controlled system that requires constant care and maintenance to control parameters like nutrients, pH, stock density, filtering, pests and diseases. The system can be adapted and changed with various system components and sizes, to favour the growing of different species of plants and animals, including fish, crustaceans, fruits, herbs and flowers. Fish effluent and its degradation into soluble nutrients, the respective ratios of each element and their availability, biofiltration of harmful gases and pH control are also discussed. The possibility of Organic Aquaponics is mentioned with reference to its benefit, as well as economic considerations.