Dissolved Oxygen (DO)
Is the most important parameter in aquaculture. DO level in pond is depends on 3 factors.
- Oxygen is not much dissolve in water and have only limited capacity to hold oxygen.
- Rate of oxygen consumption by animal, plankton and other organism in aqua pond.
- Atmospheric oxygen diffusion in pond water (increased by aerator)
These factors cause changes in the DO level in aqua system. Generally, most aquaculture species will growand thrive within a DO range of 5-12 mg/L (ppm). However, if DO level decreases below 4 mg/L, animal feelstress, stop feeding, and cause death.