In the final volume. sample collection bottles 200 ml per sampling once and then maintain the condition of plankton with water dose formaldehyde polymer 4 percent to differentiate in the following laboratory.
The final volume in 200 ml sample bottles randomly collected once. Then the preservation of plankton with Formalin solution of 4 percent to be classified in the operating room to the next.
The final volume in the bottle samples have 200 ml effects were collected at one time. The maintenance of plankton with formalin solution 4 percent. To bring the population laboratory.