Slow Shrimp Growth in Ponds? Phase-Specific Probiotic Solutions

Have you ever found vannamei shrimp in ponds growing slowly even though feed has been given optimally? The phenomenon of slow shrimp growth in ponds is often an indicator of water quality problems or dominance of pathogenic bacteria. In intensive ponds, slow growth can be caused by accumulation of ammonia, nitrite, or Vibrio blooming that suppresses shrimp appetite and health. Probiotic solutions applied according to the cultivation phase have been proven to improve water parameters and increase survival rate (SR) by 10–15%.

Why Do Shrimp Grow Slowly in Ponds?

Slow-growing shrimp generally experience stress due to suboptimal environment. Some main causes:

Accumulation of Ammonia and Nitrite

Uneaten feed and shrimp feces produce toxic ammonia (NH3). If the natural nitrifying bacteria population is insufficient, ammonia will accumulate and inhibit shrimp metabolism. Shrimp exposed to high ammonia will reduce feed intake, thus hindering growth.

Vibrio Bacterial Attack

Vibrio bacteria such as V. harveyi and V. parahaemolyticus can cause infections that trigger decreased appetite and mortality. In ponds with Vibrio dominance, shrimp growth can stop even in the early phase.

Unstable Water Quality

Parameters such as pH, dissolved oxygen (DO), and fluctuating alkalinity stress shrimp. Stressed shrimp allocate energy for survival, not growth.

The Role of Probiotics in Accelerating Shrimp Growth

Probiotics such as Bacillus subtilis and Bacillus licheniformis work synergistically to:

• Decompose organic matter, reducing ammonia load.
• Produce protease, amylase, and lipase enzymes that aid shrimp digestion.
• Compete with Vibrio through production of antimicrobial compounds.

Meanwhile, nitrifying bacteria such as Nitrosomonas sp. and Nitrobacter sp. oxidize ammonia to nitrite, then nitrite to safer nitrate. By maintaining ammonia levels below 0.1 ppm, shrimp can grow optimally without toxicity disturbances.

Water Quality Management per Cultivation Phase

Each cultivation phase has different water quality challenges. Here are management strategies using probiotics:

Pond Preparation Phase (0–10 Days)

In this phase, the pond is filled with water and sterilized. Probiotics are applied to build beneficial bacteria populations. Initial application of Vannamei Shrimp Pond Probiotic Formula at 5 L per hectare helps decompose organic residues and suppress Vibrio growth from the start.

Early Rearing Phase (11–30 Days)

Shrimp are still vulnerable to water quality changes. Ammonia begins to increase with feeding. Probiotic application every 7–10 days keeps ammonia stable <0.1 ppm and nitrite <0.5 ppm. Bacillus subtilis in the formula effectively suppresses Vibrio populations by up to 40%.

Intensive Rearing Phase (31–60 Days)

Organic load increases drastically. In this phase, water exchange can be reduced by 30% thanks to probiotics decomposing waste. Shrimp remain actively feeding and growth is uniform. Data shows vannamei shrimp SR increases by 10–15% with routine application.

Pre-Harvest Phase (61–90 Days)

Water parameters must be strictly maintained to avoid stress during harvest. Probiotics are applied until 7 days before harvest to ensure optimal water quality and shrimp free from chemical residues.

Mechanism of Probiotic Action in Ponds

Decomposition of Organic Matter

Bacillus licheniformis produces extracellular enzymes that break down proteins, carbohydrates, and fats into simple compounds. This process reduces bottom sludge accumulation and suppresses the need for water exchange.

Nitrification

Nitrosomonas oxidizes ammonia (NH3) to nitrite (NO2-), then Nitrobacter oxidizes nitrite to nitrate (NO3-). Nitrate is much less toxic and can be utilized by phytoplankton. Thus, the nitrogen cycle runs efficiently without toxic spikes.

Antagonism against Vibrio

Bacillus subtilis produces compounds such as subtilin and surfactin that inhibit Vibrio growth. Controlled Vibrio populations reduce disease risk and increase shrimp appetite.

Proper Probiotic Application Methods

For optimal results, probiotics must be applied correctly:

• Dosage: 5 L per hectare of pond.
• Frequency: Every 7–10 days.
• Time: Morning or evening when water temperature is not too hot.
• Method: Broadcast evenly into the pond. Best done after water exchange or during active aeration.

Do not mix probiotics with disinfectants such as chlorine or lime at the same time, as it can kill beneficial bacteria.

Real Results: Probiotic Performance Data

Based on field trials, probiotic application in intensive vannamei shrimp ponds shows:

• SR increased by 10–15%: More shrimp survive to harvest.
• Vibrio population decreased by 40%: Disease risk significantly reduced.
• Ammonia stable <0.1 ppm: Shrimp not disturbed by toxicity.
• Water exchange reduced by 30%: Operational cost savings.

Thus, probiotic investment not only increases productivity but also cultivation efficiency.

Conclusion

Slow shrimp growth in ponds can be overcome with good water quality management per cultivation phase. Probiotics containing Bacillus subtilis, Bacillus licheniformis, Nitrosomonas, and Nitrobacter can suppress ammonia, control Vibrio, and increase vannamei shrimp SR. Routine application every 7–10 days at a dose of 5 L per hectare provides optimal results. For further consultation, contact the Biosolution technical team via WhatsApp. See product details Vannamei Shrimp Pond Probiotic Formula for a complete solution for your pond.