Blue-green algae

Deterioration of pond bottom or accumulation of organic materials leads to the faster development of blue-green algae bloom than green algae. Blue-green algae such as Oscillatoria, Phormidiu, Microsystis and Microcoleus dominate (accounting for 90%). Although the survival rates in ponds with this colour still remains high, the growth rate sinks. So, the growth of blue-green algae is undesirable and should be remove from fish ponds.