Model of a system from Fry and Hart (2007) with an aquarium containing goldfish and a water flow.
The temperature is kept at 15C throughout the run-time of 4380hrs. In this model the Respiration is dependant on the water temperature, the total fish mass and Km to oxygen.
The model also contain fish growth.
Km
The Km was determined from trail and error. The best fit was found at 77.
Fish growth
When the fish assimilate one mole of carbon it gains 26.4 grams. It is assumed in the model that for every mole of oxygen is respired, one mole of carbon is assimilated. The initial fish stock was 0.08kg.