Shrimp Growing Slowly in Ponds? Causes & Probiotic Solutions

Slow growth of shrimp in ponds is a classic complaint that often haunts intensive vaname shrimp farmers. When growth rates fall short of targets, production costs swell, harvests are delayed, and profit margins erode. This article will thoroughly explore the causes of slow shrimp growth and how aquaculture probiotic solutions can be a scientific answer to overcome them. By understanding the causal factors and mechanisms of probiotics, you can optimize pond management and achieve more profitable harvests.

Why Are Shrimp Growing Slowly? Key Factors to Watch

Shrimp growth is influenced by complex interactions between water quality, feed, shrimp health, and pond environment. Here are the main factors causing slow shrimp growth:

1. Poor Water Quality

High ammonia (NH3) and nitrite (NO2) are toxic to shrimp, inhibiting metabolism and appetite. Ammonia at concentrations >0.1 ppm can cause oxidative stress, damage gills, and reduce growth rate. High nitrite disrupts oxygen transport in the blood, making shrimp weak and reluctant to eat. Additionally, fluctuating pH, low dissolved oxygen levels, and extreme temperatures also trigger slow growth.

2. Pathogenic Bacterial Attack (Vibrio)

Vibrio harveyi and Vibrio parahaemolyticus are the main pathogenic bacteria attacking vaname shrimp. Vibrio infection causes diseases like vibriosis, characterized by pale hepatopancreas, necrosis, and death. At subclinical levels, Vibrio inhibits nutrient absorption in the gut, so shrimp survive but growth stagnates. High Vibrio populations in ponds are often the main cause of slow shrimp growth without mass mortality.

3. Suboptimal or Indigestible Feed

Low-quality feed or feed not meeting shrimp nutritional needs leads to high feed conversion ratio (FCR). Worse, if feed is not fully digested, leftover feed accumulates on the pond bottom and decomposes, producing ammonia and toxic gases. Shrimp that expend energy digesting hard-to-digest feed have less energy for growth.

4. Environmental Stress

High stocking density, rough handling, or extreme weather changes trigger stress responses in shrimp. Stress increases cortisol hormone, which is catabolic, causing muscle protein to be broken down for energy rather than growth. Stressed shrimp are also more susceptible to infection.

The Role of Aquaculture Probiotics in Addressing Slow Shrimp Growth

Aquaculture probiotics are live microorganisms that provide health benefits to shrimp and the pond environment. By applying probiotics regularly, farmers can naturally and sustainably address the causes of slow shrimp growth. Here are the mechanisms of probiotic action:

1. Suppressing Vibrio Populations

Probiotic bacteria such as Bacillus subtilis and Bacillus licheniformis produce antimicrobial compounds (bacteriocins, lytic enzymes) that directly inhibit Vibrio growth. Bacillus subtilis also competes with Vibrio for nutrients and attachment sites in the shrimp gut, preventing Vibrio from colonizing the digestive tract. As a result, Vibrio infections decrease and nutrient absorption improves.

2. Degrading Organic Matter and Improving Water Quality

Bacillus licheniformis and Bacillus subtilis produce extracellular enzymes such as protease, amylase, and lipase that degrade leftover feed, feces, and dead plankton. This process reduces the organic load on the pond bottom, thereby decreasing ammonia and toxic gas production. Additionally, nitrifying bacteria like Nitrosomonas sp. and Nitrobacter sp. oxidize ammonia into nitrite and then into non-toxic nitrate. Thus, ammonia and nitrite levels remain safe (<0.1 ppm), supporting optimal shrimp growth.

3. Enhancing Feed Digestibility

Probiotics help break down hard-to-digest feed components, such as fiber and complex proteins, into simpler molecules. This increases nutrient availability for shrimp, resulting in lower FCR and faster growth. Shrimp receiving probiotics also have more active digestive enzymes.

4. Strengthening Shrimp Immune System

Some probiotic strains can modulate shrimp immune responses by activating white blood cells (hemocytes) and producing antioxidant enzymes. Shrimp with a strong immune system are more resistant to stress and infection, allowing energy to be focused on growth.

Vaname Shrimp Pond Probiotic Formula: The Right Solution for Intensive Ponds

Vaname Shrimp Pond Probiotic Formula from Biosolution is an aquaculture probiotic product specifically formulated for intensive vaname shrimp ponds. It contains 4 superior bacterial strains that work synergistically:

• Bacillus subtilis: Anti-Vibrio and organic decomposer.
• Bacillus licheniformis: Producer of extracellular enzymes that accelerate organic matter degradation.
• Nitrosomonas sp.: Oxidizes ammonia into nitrite.
• Nitrobacter sp.: Oxidizes nitrite into nitrate.

This combination ensures maintained water quality, controlled Vibrio, and better feed digestibility. Field test results show:

• Shrimp survival rate (SR) increases by 10–15%
• Vibrio population drops by up to 40%
• Ammonia stable at <0.1 ppm
• Water exchange reduced by 30%

Practical Application Method

This product is applied by direct broadcasting into the pond. The recommended dosage is 5 liters per hectare of pond, every 7–10 days. The best time is morning or evening when water temperature is not too hot. With regular frequency, pond microbial balance is maintained, and shrimp grow optimally.

Case Study: Improved Shrimp Growth with Probiotics

A study in an intensive vaname shrimp pond in East Java showed that regular application of Bacillus and nitrifying bacteria probiotics over one cycle (90 days) resulted in:

• Average daily gain (ADG) increased by 12% compared to control.
• FCR decreased from 1.6 to 1.4.
• SR reached 85%, up from 70% in ponds without probiotics.

This data is consistent with reports from IRRI (International Rice Research Institute) stating that aquaculture probiotics effectively increase pond productivity (source: IRRI - Probiotics in Aquaculture). Additionally, the Indonesian Ministry of Marine Affairs and Fisheries also recommends the use of probiotics for sustainable shrimp farming (source: KKP - Shrimp Farming Guidelines).

Conclusion

Slow shrimp growth in ponds is not an insurmountable problem. By identifying the causes—poor water quality, Vibrio attacks, suboptimal feed—and applying aquaculture probiotic solutions appropriately, farmers can improve shrimp growth, reduce production costs, and achieve more profitable harvests. Vaname Shrimp Pond Probiotic Formula from Biosolution offers a comprehensive solution with a combination of superior bacteria proven to increase SR, suppress Vibrio, and maintain water quality. For further consultation on dosage and application schedules suitable for your pond conditions, contact the Biosolution technical team via WhatsApp. We are ready to help you achieve productive and sustainable ponds.