Optimisingthe small-scale aquaponic operation process with big head catfish (Clarias macrocephalus)by the computer mode

This study aimed to optimise the operating process of a media-filled aquaponic system for raising bighead catfish (Clarias macrocephalus) based on a computer model.The computer model was built using the agent-based modelling (ABM) approach and calibrated with experimental datasets.The optimised results from the model runs suggested operating processes for six fish tank volumes (500, 1,000, 1,500, 2,000, 2,500, and 3,000 litres), where fish density can reach a maximum of 150 kg/m of water; the fingerling size is 20 g/fish; and the vegetable growing area is balanced according to fish weight (5-6 kg of fish/m).Water circulation should be adjusted according to the fish tank volume, ranging from 16 to 24 times per day.To maximise the benefits, balance fish weight gain and feed consumption, it is suggested to harvest the fish after 151 days of raising in the aquaponics system.When applying these operating processes, it is necessary to regularly monitor water quality and adjust pumping and wastewater discharge as needed.