Keeping pond water clean and healthy during the rainy season is crucial for fish farmers. Rain can easily pollute pond water, often turning it green due to excess weeds and algae. To maintain a healthy environment for fish to grow well and stay disease-free, experts strongly recommend using lime and cow dung in ponds during this season.
Why Lime and Cow Dung Matter
Healthy fish growth doesn’t rely only on good feed and medicines the quality of pond water is equally important. If pond water stays clean and free from harmful weeds or pollutants, fish grow faster, stay healthy, and fetch better prices in the market.
Key Reasons to Use Lime and Cow Dung
- Controls pollution: Lime neutralises harmful acidity and balances water pH.
- Improves water quality: Cow dung promotes healthy plankton growth, which is a natural food source for fish.
- Prevents diseases: Healthy water conditions reduce the chances of fish getting infected.
Expert Tips to Maintain a Healthy Fish Pond
✅ If the pond water turns green during heavy rain, stop adding lime and dung for about 15–30 days.
✅ During heavy rainfall, dissolve 15–20 kg of lime per acre and add it to the pond to maintain water balance.
✅ If reusing a nursery pond, always dry it fully first to remove old residues and pests.
✅ To prepare a nursery pond again:
- Spread 1,000–2,000 kg of cow dung and 50 kg of lime per acre.
- Fill the pond with one foot of water and let it sit for 5–7 days.
- After that, fill the pond up to 5 feet.
✅ Once the pond is ready, stock 20 lakh spawn (baby fish) per acre.
✅ Always transport fish seed (spawn) in cool, shaded conditions to avoid stress.
✅ Remove unwanted aquatic weeds by using 3 kg of 2-4 D herbicide per acre if needed.
✅ Stop feeding fish one day before transferring seed from the nursery pond.
By following these simple steps, farmers can protect fish health, ensure better growth, and earn more profit, even during the challenging monsoon season.
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