Signs of Shrimp and Fish Disease Due to Oxygen Deficiency

Sometimes, even in a seemingly adequate environment, if CO2 levels rise too high up to 80mg/l at temperatures of 20-31°C, CO2 in the fish's blood cannot escape, causing central nervous system depression. Fish have difficulty obtaining dissolved oxygen in the water. If the carbonic acid content in the water is 20mg/l and the fish gasp for air, it is mainly due to oxygen deficiency.

 

Symptoms:

Oxygen-deficient fish often swim to the water surface, gulp air to breathe, a phenomenon known as head-up behavior. If the oxygen deficiency persists, the gills protrude, the color on the back fades, and in fish ponds, if catfish swim with their heads up, the condition is relatively mild. Conversely, if all the fish in the pond swim with their heads up before midnight or swim aimlessly, lying straight, or bumping their heads against the shore, it indicates severe oxygen deficiency. Without proper treatment, the fish will die en masse, or even entirely. Prolonged oxygen deficiency causes the fish's body to lack blood, stunted growth, and protruding lower jaws.

When shrimp suffer from oxygen deficiency, the first sign is swimming to the surface, drifting to the shore, sporadic to mass deaths, especially concentrated in the early morning. Shrimp stop eating because they cannot reach the bottom to feed due to lower dissolved oxygen concentrations there. Inspection reveals shrimp transitioning from creamy white to pink.

  

  

Shrimp/fish's heads float due to lack of oxygen

Shrimp's gills turn pink due to lack of oxygen

Prevalence:

In summer, fish and shrimp are most likely to swim to the surface when there is thunder but no rain, or before a storm due to decreased oxygen levels caused by decreased dissolved oxygen and reduced water volume. This causes fish and shrimp to swim to the surface or, sometimes, short thunderstorms lower the water temperature at the surface while the bottom layer remains warm, causing convection currents. Organic sludge at the bottom is stirred up, enhancing decomposition, consuming more oxygen, and producing toxic gases like H2S, NH3, CO2, causing fish and shrimp to swim to the surface. Ponds with strong algae growth photosynthesize and produce a lot of O2 during the day, but conversely, during respiration at night, they consume more O2 from the environment and release more CO2, causing fish and shrimp to swim to the surface.

Prevention and Treatment:

Clean the fish or shrimp pond, remove sludge, and partially dredge the mud to achieve an appropriate level before refilling the water.

Fertilizers should be properly composted, and the amount should be adjusted according to weather conditions and water quality.

The stocking density of fish or shrimp in nursery ponds should not be too high to ensure sufficient oxygen levels.

Regularly monitor changes in the environment to add clean water to the pond. If possible, use air pumps to timely supplement oxygen to the pond.

For industrial shrimp ponds, in cases of oxygen deficiency detection or prevention, use oxygen tablets (Sodium percarbonate) combined with Yucca to prevent or provide immediate oxygen to the shrimp.

 

 

VENTEK Nano Bubble Oxygen - Effective Oxygenation Equipment for High-Density Shrimp Farming

Currently, shrimp farmers are facing many challenges: Disease outbreaks, the lowest prices in the past 10 years, continuously rising farming material prices, and poor-quality shrimp seeds. Aqua Mina understands this and has introduced a device that provides nano oxygen particles to shrimp ponds with the VENTEK Nano Bubble Oxygen.

AQUA MINA Company is the exclusive distributor of the Ventek Nano Bubble Oxygen, which is produced by Huetronics JSC.

The Ventek Nano Bubble Oxygen generates ultra-fine oxygen particles with a size of 1.6 micrometers, enhancing oxygen absorption by shrimp.

  

 

With an average bubble size of only 1.6 micrometers (figures proven by the Vietnam Military Science and Technology Institute), VENTEK is one of the tools that effectively dissolve oxygen into water, maintaining oxygen at the highest level on the market. It helps shrimp absorb oxygen better, making them healthier and grow faster by 10% compared to traditional methods, with very reasonable costs.

  

 

The initial investment cost is only 50%, and the operating cost is 20% that can completely replace the current problematic bottom aeration systems. Completely replacing the bottom aeration pipes means no need for labor to clean the air pipes after each farming season, no more worries about fungal growth on plastic feet and air pipes, keeping the pond bottom clean and tidy, saving labor costs. Especially, the VENTEK Nano Bubble Oxygen is extremely effective when oxygen supplementation is needed to reduce the size of shrimp in the late farming season. Larger-sized shrimp fetch higher prices, increasing profits for the farming season.

 

The VENTEK Nano Bubble Oxygen is designed specifically for the aquaculture industry, produced by Huetronics Corporation; a company with over 34 years of experience in researching and developing high-tech electronic and clean agriculture products.

The product has been researched and tested for over 5 years at shrimp farms in Thua Thien Hue province, Can Gio district (Ho Chi Minh City), Soc Trang province, and many provinces and cities nationwide, bringing about high efficiency. The application of twisting technology helps to mix oxygen into the water better than other versions. After more than 2 years of research and negotiation, we have reached an agreement for Aqua Mina to exclusively distribute the VENTEK Nano Bubble Oxygen both domestically and internationally.

 

 

Contact AQUA MINA for consultation and to acquire mobile round tanks to enhance your agricultural production efficiently.

AQUA MINA CO. LTD

Address: 685 Highway 1A, Quarter 4, Binh Hung Hoa Ward, Binh Tan District, Ho Chi Minh City. 

Website: aquamina.com.vn

Hotline: 1800 6071 (toll-free)

Email: sales@aquamina.com.vn or oversea@aquamina.com.vn

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