Hot weather with high temperatures affects shrimp and the quality of pond water. Shrimp are susceptible to temperature or harmful pathogens. Especially in hot weather, blue-green algae and thyroid algae thrive in the pond and excrete toxins that are harmful to shrimp. Poor water quality, pollution, pH fluctuations and lack of oxygen in the pond severely affect shrimp and can even cause mass deaths and damage. In the following article you will learn how to manage shrimp ponds in the hot season?

Effects of hot weather on shrimp and pond water

Sudden or prolonged high temperatures can do great harm to the health of farmed shrimp.

Excessively high temperatures cause heat shock in shrimp

The normal temperature for Black Tiger shrimp is 28-30oC, for White Leg shrimp it is 25-30oC. If the temperature rises above 32oC, the shrimp will go into shock and bury themselves in the ground to escape the heat, where they will find toxic gasses and harmful pathogens.

Too high temperatures lead to oxygen deficiency and accumulation of toxic gasses

In hot weather, shrimp are more active, consume more energy and more oxygen, and biochemical reactions in the water also increase oxygen consumption, resulting in oxygen deficiency in ponds at night.

 

MANAGE A SHRIMP POND IN HOT SUMMER?

In addition, high temperature is also a prerequisite for algae to thrive. When the algae die, many toxic gasses ( H2S, NO2, NH3, etc.) are produced, which accumulate at the bottom of the pond and harm the shrimp.

High temperatures cause sudden changes in environmental factors and make the shrimp susceptible to diseases

Water evaporates quickly, water level is low, salinity increases, environmental factors change suddenly, shrimp suffer shock. At the same time, this makes the shrimp susceptible to diseases: Body deformity, white feces disease, hepatopancreatic necrosis, etc.

How to manage shrimp ponds in the hot season

For more effective pond management during the hot season, farmers need to reduce water temperature, add nutrients to the pond, treat algae, and reduce pond salinity.

Solutions to reduce the heat in shrimp ponds during the hot season

Keep the water level in the pond at 1.2 – 1.5 m. Add cool water (in the bottom layer) to shrimp ponds in the afternoon.

Nets can be used as sunscreens to reduce temperature rise and shock to shrimp

Increase the fan to limit temperature stratification and ensure adequate oxygenation of the pond.

Limit shrimp catch at midday to limit deformation of shrimp bodies.

Regularly check pond environment parameters (salinity, pH, oxygen, temperature, NH4/NH3, NO2, …) and monitor to take timely action to address them.

Flush the pond bottom regularly (if possible) to reduce the amount of organic sludge and limit harmful glasses for shrimp.

How to improve nutrition for shrimp pond water

Supplement vitamin C, minerals and liver tonic to increase the resistance of shrimp. The use of the comprehensive development combination VII FARM, added to the daily shrimp feed, helps to improve the digestibility and absorption of food and stimulates the growth of shrimp.

How to treat toxic gas in shrimp ponds

Periodic 3-5 days of using yeast in wastewater treatment VII FARM in the afternoon to help beneficial bacteria inhibit harmful bacteria, improve the ability of organic fertilizer, inhibit the generation of toxic gasses such as H2S, NH3, NO2, … Control algae, stabilize water color.

How to prevent algae from growing in shrimp ponds in the summer

If it is hot, algae grow densely, you can resort to the following method:

  • Morning 30-50% water change, increase mineral intake, intestinal enzymes and detoxification of shrimp liver (during the time of water treatment).
  • 21h, 1 bag of hot lime CaO
  • 22h, pour 50 -70 liters of probiotics EM
  • Next morning, 20% water change, 9-10h add 1 bag of lime + 1 bag of zeolite powder.
  • Repeat this process until the algae have receded after 2-3 days

How to reduce salinity for shrimp ponds effectively

To reduce the salinity of the water in shrimp ponds, farmers need to prevent algae growth in shrimp ponds in the summer, as mentioned earlier. Then a blower is used to ensure the oxygen level in the shrimp pond at all times.

Adjust the amount of food in the pond appropriately, avoid sewage, and effectively reduce the pollution and salinity of shrimp ponds. If you want to add new water to the pond, you also need to make sure that the water in the pond is treated at least 6 days in advance.

We hope the above will provide a lot of useful information for farmers to use in the best season.