The book collection "Aquaponics systems, fish" is intended to disseminate the sciences of synergistic food production such as aquaponics. This food production system is accessible to the general public and eliminates many of the current problems related to the control of the context of an aquaponic system. This fifth volume specifies the chapters related to the maintenance and improvement of an aquaponic system. Firstly, in the aspect of maintenance, the important factors to maintain the usefulness of your food system are reviewed, as well as stress issues and maintenance cycles. In the same way, problems, errors and solutions to different problematic contexts in which your system can fail are observed. Secondly, we look at methods of improving your production system. It examines techniques to convert losses into profits within your production, monetization methods and specific cases where the collection of information from your aquaponic system is automated through technology. The following volumes will discuss issues specific to aquaponics systems, production improvement techniques and optimization through technology.