1/ Preparing the nursery pond :

• Area: It accounts for about 5-10% of the pond area.

• Instruments: preparing from 1-2 paddle wheels (10-20 propellers) or installing more aerators in the pond bottom.

2/ Renovating and treating water of nursery ponds:

• Drying the pond bottom or draining off the water. Using limes at a dose of about 30 – 60 kg/1000 m² for acid-soil areas.

• Taking water into the nursery pond through filter bags to remove trash fish.
• Depth: about 1.2 – 1.4 m.
• Using Hat Sinh Hoc Phu Dien after taking enough water into the pond for two days. It helps create watercolor and natural food resources such as worms, rice snails, and copepods.

• Using paddle wheels from 8 am to 4 pm daily after using the Hat Sinh Hoc Phu Dien
• Adjusting environmental factors: pH from 7.5-8.3, alkaline > 120 mg/l

3/ Selecting and stocking postlarvae: After treating the water for 7-10 days, the watercolor and natural food has stabilized, we start stocking.

• Selecting reputable, quality, disease-free from postlarvae hatcheries.
• Choosing postlarvae that are highly adaptable to severe environmental conditions and have high disease resistance.
• Stocking in the early morning or late afternoon.
• Acclimating shrimp with ponds water about 1-2 hours before stocking in clean plastic buckets with aeration.

Acclimating shrimp before stocking

4/ Stocking density:

• Density:

+ Black tiger shrimp: 10 – 20 shrimps/m²

+ White leg shrimp: 25 – 30 shrimps/m²

5/ Taking care of postlarvae:

• Feeding shrimp from 3 – 4 times per day.
• Using paddle wheels after feedings from 2 – 3 hours (oxygen > 50mg/l)
• Periodically using probiotics from 5-7 days per time.

6/ Shrimp nursery time:

• In the range of 25 – 35 days, depending on the farmer’s purpose and the weather condition, the nursery time is long or short .

7/ Renovating and treating water of culture ponds:

• During the nursing period, you should renovate ponds in the same way as the nursery pond. However, you don’t need to set up paddle wheels.
• The depth of water in the nursery pond is from 0.5 – 0.7 m.

8/ Transferring shrimp from nursery pond to farming pond:

• Adjusting environmental factors between ponds and nursery ponds relatively equally.
• Transferring shrimp after they reach the size of 800 – 1000 individuals/kg.
• Transferring shrimp in the early morning or late afternoon.
• There are several ways to transfer shrimp. The best way is to discharge the water from ponds to the nursery ponds, combined with using food as bait.
• Density:

+ Black tiger shrimp: 1 shrimp/m²

+ White leg shrimp: 5 shrimp/m²

9/ In case there is no fixed nursery pond and no equipment such as paddle wheels or aerators:

+ Black tiger shrimp: 10 shrimps/m²

+ White leg shrimp: 25 shrimps/m²

• We recommend you not stock for the next crop if there is no fixed nursery pond because the survival rate will be low.

10/ Note that the better the nursery pond, the higher the survival rate. In addition, it is also significant to the success of the crop.