Discover the Importance of Water Quality in Aquaculture – The Secret to Healthy Fisheries

March 22, 2023

Oscar Peter


Aquaculture is a rapidly growing industry that provides a significant source of protein for human consumption. According to the Food and Agriculture Organization (FAO), aquaculture accounts for nearly 50% of the fish consumed globally, and its contribution to global fish production is projected to reach 53% by 2030. However, to maintain healthy and productive fisheries, it is recommended to ensure good water quality in aquaculture operations.

Factors Affecting Water Quality in Aquaculture
Several factors can affect water quality in aquaculture operations, including:

  • Temperature: Maintaining Optimal Range is Critical

Temperature is a critical parameter in aquaculture that affects the growth, reproduction, and overall health of fish. According to research by the University of Arkansas, temperature fluctuations can cause stress and disease in fish, leading to increased mortality and reduced growth rates. It is essential to maintain a stable temperature that is optimal for the specific cultivated species.Different fish species have different temperature requirements. For example, Tilapia grows best at temperatures between 25°C and 32°C, while Trout prefers cooler water between 10°C and 15°C. Fluctuations in water temperature can cause stress and disease in fish, and extreme temperatures can lead to mortality

  • pH: Maintaining the Ideal Range Prevents Stress and Disease

Maintaining optimal pH levels in aquaculture is essential for preventing stress and disease in fish and improving production. Fish are sensitive to changes in pH, which can affect their growth, reproduction, and overall health. According to the World Aquaculture Society, the recommended pH range for most freshwater fish is between 6.5 and 8.5.The pH of water is a measure of its acidity or alkalinity. Most fish species prefer a pH range of 6.5-8.5, with some species having a narrower range. Deviations from this range can cause stress and disease in fish. For example, low pH can cause acidosis and impair fish growth, while high pH can cause alkalosis and respiratory distress. Therefore, maintaining the ideal pH range is essential for the health and growth of aquatic organisms.

  • Dissolved Oxygen: Low Levels Can Be Fatal

Fish and other aquatic organisms require oxygen to breathe, and dissolved oxygen (DO) is a critical water quality parameter in aquaculture. The ideal DO range for most fish species is between 5 and 7 mg/L. Low DO levels can cause stress, disease, and mortality in fish. For example, in Rainbow Trout, DO levels below 3 mg/L can cause respiratory distress and DO levels below 2 mg/L can be fatal. Therefore, maintaining optimal DO levels is crucial for the survival and growth of fish.

  • Nitrogenous Compounds: Toxicity in the Environment

Nitrogenous compounds, such as ammonia and nitrite, are major water quality problems in aquaculture. According to the World Aquaculture Society, ammonia toxicity is the most significant problem, with toxic levels causing mortality and reduced growth rates in fish. To manage fluctuating nitrogenous compounds, it is essential to use efficient filtration systems, maintain proper feeding practices, and conduct regular water exchanges.High levels of ammonia, nitrite, and nitrate can be toxic to fish and other aquatic organisms. For example, ammonia is toxic at concentrations above 0.1 mg/L, nitrite at concentrations above 0.5 mg/L, and nitrate above 100 mg/L.

  • Total Suspended Solids and Turbidity: Affect Water Clarity and Growth

High levels of total suspended solids and turbidity in aquaculture can reduce light penetration, affecting the growth of aquatic plants and algae(essential food sources for some fish species). According to research by the University of Arkansas, high levels of total suspended solids can also lead to reduced growth rates and increased mortality in fish. Managing these levels using effective filtration systems and reducing sedimentation is necessary.

How to Maintain Good Water Quality in Aquaculture?
Maintaining good water quality in aquaculture requires regular monitoring and management of the various parameters that affect it. Here are some ways to maintain optimal water quality:

  • Monitoring and Testing

Regular monitoring and testing of water quality parameters, such as temperature, pH, dissolved oxygen, and nitrogenous compounds, can help identify potential problems before they become severe. According to research by the World Aquaculture Society, monitoring and testing should be conducted at least once a week to ensure optimal water quality.

  • Efficient Filtration Systems

Efficient filtration systems, such as biofilters and mechanical filters, can help remove excess nutrients, solids, and other contaminants, improving water quality and reducing the risk of disease outbreaks. According to research by the University of Florida, a well-designed filtration system can remove up to 95% of nitrogenous compounds from the water.

  • Proper Feeding Practices

Overfeeding can lead to nitrogenous compounds increase in the water, leading to poor water quality and an increased risk of disease outbreaks. It is essential to feed fish the right amount of food based on their needs and to ensure that uneaten food is removed promptly from the water.

  • Regular Water Exchanges

Regular water exchanges can help remove excess nutrients, nitrogenous compounds, and other contaminants from the water, improving water quality and reducing the risk of disease outbreaks. According to research by the University of Arkansas, the recommended water exchanges for most aquaculture systems should be 10-20% per week.

  • Proper Stocking Density

Overcrowding can lead to poor water quality, stress, and increased disease susceptibility in fish. It is essential to maintain the proper stocking density based on the fish size and the volume of water in the system. According to the World Aquaculture Society, the recommended stocking density for most fish is between 20 and 30 kg/m3.

Biological Solution to Boost Water Quality in Aquaculture
As aquaculture gains more importance in the global economy, ensuring top-quality production while remaining competitive is becoming increasingly challenging. However, we have the solution to this problem. We are game changers in the field, providing a range of probiotics for fish in aquaculture that use a blend of microbes and enzymes to enhance water and soil quality, and promote the healthy growth of aquatic animals. Our cutting-edge solutions can be utilized for farming shrimp, shellfish, fish, and even aquatic plants. Trust us to help you achieve the highest quality, sustainable aquaculture production:

  1. Bioclean Aqua Fish is a biological solution that can condition water in both marine and freshwater fish farms, ensuring stable pond conditions for fish rearing. This product facilitates effective water treatment in ponds, while also aiding in the decomposition of organic matter to maintain pond bottom health. Additionally, Bioclean Aqua Fish helps regulate pH levels, increase oxygen levels, and reduce harmful gases like hydrogen sulphide and ammonia, which could otherwise be toxic to fish.
  2. Bioclean Aqua Plus enhances the culture of vannamei shrimp by promoting their food uptake and enabling high-density stocking without nutrient stress. This solution also increases the shrimp’s ability to adapt to changing weather conditions. The probiotic bacteria in Bioclean Aqua Plus play a crucial role in maintaining a clean soil and water environment for the vannamei shrimp, effectively breaking down sludge and preventing the growth and spread of harmful bacteria that can cause diseases such as white spot disease. With Bioclean Aqua Plus, you can ensure the optimal growth and health of your vannamei shrimp.

Good water quality is crucial for maintaining healthy and productive fisheries in aquaculture operations. Factors such as temperature, pH, dissolved oxygen, nitrogenous compounds, and total suspended solids can affect water quality and fish health. Regular monitoring and management of these parameters, along with efficient filtration systems, proper feeding practices, constant water exchanges, and adequate stocking density, can help maintain optimal water quality in aquaculture systems. By prioritizing good water quality, aquaculture operations can ensure the sustainable production of healthy and nutritious fish for human consumption.

Post by Oscar Peter