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Managing water color of shrimp pond

2.1.4. Managing water color

- Create and control water color in ponds helps develop micro-plankton, stability of water environment, and creates a favorable environment to limit shocks in shrimp and improve survival rate.

- The use of biological products from reputable companies with clear sources (such as TA-GOLD, Rhodo powder, Pro BCS, etc.), incubated with rice bran, molasses, soy flour, before being released in ponds can control water color.

- Combined with using lime Dolomite + CaCO3 with a dose of 20 kg/1000m3.

Note:

+ Do not use inorganic fertilizers to create color for the water.

+ Check and adjust water environmental factors in pond before stocking:

Table 4. Quality of water supplied to ponds and water in ponds.

No.

Parameter

Unit

Allowed values

1

Dissolved oxygen

mg/l

≥3,5

2

pH

7÷9, with fluctuation during a day no more than 0,5

3

Salinity

per mile

5÷35

4

Alkalinity

mg/l

60÷180

5

Turbidity

cm

20÷50

6

NH3

mg/l

<0,3

7

H2S

mg/l

<0,05

8

Temperature

degree Celsius

18÷33

Source: Temporary process for safe brackish-water shrimp farming in areas affected by diseases in Vietnam. According to The Official Dispatch No. 10/TCTS-NTTS. January 6th, 2015. Vietnamese Directorate of Fisheries.

Viet Linh 2015. Translated by Sonia Linh V.

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