Why do shrimp and fish ponds have a foul odor? How to eliminate bad odor effectively within 24 hours

The foul odor coming from aquaculture ponds not only causes discomfort for farm managers but is also a “red alert signal” for the health of shrimp and fish. If not handled promptly, it can become the breeding ground for toxic gases, disease outbreaks, and the failure of an entire farming cycle.

1. Causes of Foul Odor in Shrimp and Fish Ponds

In aquaculture environments, foul odors (commonly similar to rotten eggs or strong muddy smells) mainly originate from the following factors:

• Accumulation of uneaten feed: Excess protein from feed that is not fully digested settles at the pond bottom and decomposes under low-oxygen conditions, producing unpleasant odors.
• Dead algae (Blue-green algae, dinoflagellates): When algae blooms collapse, dead algae decompose very rapidly, releasing toxins and strong odors while making the water slimy.
• Formation of toxic gases: The decomposition of organic matter at the pond bottom generates toxic gases such as H₂S (hydrogen sulfide – rotten egg smell) and NH₃ (ammonia). These are silent killers that can cause mass mortality of shrimp and fish.
• Black sludge at the pond bottom: This black sludge layer contains many anaerobic bacteria and accumulated waste, creating persistent foul odors if not treated regularly with biological products.

2. Serious Impacts of Foul-Smelling Pond Water

Foul odor is a clear sign that the pond environment is severely polluted:

• Shrimp and fish become stressed: Reduced immunity, poor appetite, and slow growth.
• High disease risk: Fungi (especially coin fungus / black spot fungus) and Vibrio bacteria thrive in dirty environments.
• Bottom-layer oxygen depletion: Organic decomposition consumes large amounts of oxygen, causing shrimp and fish to surface at night or early morning.

3. Eliminating Pond Odor Effectively Within 24 Hours with ECO BLUE

To solve foul odors at the root, farmers should avoid using chemical deodorants that provide only temporary relief.
The most sustainable solution is the use of biological probiotics to decompose organic waste.

ECO BLUE, a specialized product from My Binh Company, is widely trusted for its fast and powerful environmental treatment performance.

Breakthrough Composition

ECO BLUE contains a high density of beneficial bacteria Bacillus licheniformis, which actively works in pond environments to break down complex organic compounds.

Outstanding Benefits of ECO BLUE

Rapid odor removal: Within just 24 hours, foul odors from pond water and bottom sludge are significantly reduced.

Sludge decomposition: Black and dirty sludge is effectively broken down within 3 days.

Environmental stabilization: Suspended solids are reduced, water becomes clearer, and water color stabilizes after 2–3 days.

Inhibits coin fungus: Suppresses the growth of foot fungus and coin fungus—major causes of intestinal diseases in shrimp.

Hardens and stabilizes pond bottom: Helps reduce dredging and sludge removal costs after each farming cycle.

4. Instructions for Using ECO BLUE for Maximum Effectiveness

Depending on the farming model, apply the following dosages:

For lined ponds (HDPE / high-tech ponds):

Use 250 g for 2,000 – 3,000 m³ of water

Recommended for daily use to maintain a clean, odor-free environment

For earthen ponds:

Use 250 g for 3,000 m³ of water

Apply every 5–7 days

Tip:
To treat strong odors at the pond bottom more effectively, mix ECO BLUE with cooked rice and bury it directly into the sludge layer.

For extensive farming systems:

Use 250 g per hectare, every 5–7 days, to decompose rice straw and organic residues into beneficial organic matter.

Conclusion: Eliminating foul odors in aquaculture ponds is not difficult when the right method is chosen.
Using ECO BLUE not only removes bad odors within 24 hours but also creates a clean, safe, and stable environment, helping shrimp and fish grow healthily and reach harvest successfully.

This article helps farmers identify the root causes and apply a complete odor-elimination solution within just 24 hours.