The main and only element of surviving the fish is water. The water of pond must have the characteristics to meet up the biological demand of fish. Because the physical, chemical and biological qualities of water influence the living and control the production of fish. The qualities of water is also depends on the physical and chemical qualities of soil. There is a favorable rate of physical, chemical and biological qualities of water for surviving, food consuming, body growth, breeding and for managing efficiently other important metabolic tasks of fish. This favorable rate of physical, chemical and biological qualities of water are described below.
Physical qualities of water are listed below.
|Physical Qualities||Favorable Condition for Surviving and Growing|
|Depth of Water|
|Transparency of Water||25cm|
|Temperature of Water||25°-35°c|
|Water Color||Slightly Green|
|Sunlight||Presence of Sufficient Sunlight|
Chemical qualities of water are listed below.
|Chemical Qualities||Favorable Condition for Surviving and Growing|
|Dissolved Oxygen||5-8 mg/Litter|
|Dissolved Carbon dioxide||1-2 mg/Litter|
|Phosphorus PPM||0.5-1.0 mg/Litter|
|Nitrogen PPM||2-4 mg/Litter|
|Potassium PPM||1.0 mg/Litter|
Biological qualities of water are listed below.
|Biological Qualities||Favorable Condition for Surviving and Growing|
|Floaty Plants||The water would be free from floaty plants.|
|Sunk Plants||There are some sunk plants in the water which are very harmful for fish farming. Remove those from water.|
|Alga/Moss||Water will be free from all types of alga or moss.|
|Diseases||The water will be free from diseases.|
|Plankton||Presence of plankton is favorable for fish farming. Plankton will be available in the water in moderate rate.|