WATER EXCHANGE MANAGEMENT IN FISH FARMING
The three basic systems used in water exchange activities are: Static system, flow- through system and re-circulating system
List of the system used in water exchange management activities
- STATIC SYSTEM: There is no continuous flow of water and rely on low biomass or natural process within the pond system to maintain water quality with only occasional water addition as may be required. Most pond system is static and major water problem encounter here is algae bloom and low dissolve oxygen. The remedy is partial draining and replacing of lost of water.
- FLOW THROUGH SYSTEM: This system uses water only once while this system remain full as water enter and leaves the system same time from different location. Sometimes this can be used to generate a circular water current, out flowing water leaves via overflow like an external stand pipe and drawn from the bottom of the tanks self cleaning.
RE-CIRCULATING SYSTEM: This system is popular in water quality management as they are used to conserve and maintain temperature.
Risks of introducing pathogen into the pond with influent water are also avoided by re-use or re-circulation of water. Sometimes blending of fresh water with re-used one is effective.