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Chemical Name | Calcium Oxide (CaO) |
Purity | ≥90% (High purity ≥95% ) |
Appearance | White lumps/powder |
Impurity Content | ≤1% (Strict control of trace elements like iron and magnesium) |
Packaging Specifications | 25kg bags or 1-ton Jumbo bags |
Standards Compliance | Complies with GB/T 1594-2008 Industrial Quicklime Standard; Certified by ISO 9001 and SGS |
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Quick lime is widely applied in aquaculture as a cost-effective and practical auxiliary material, playing crucial roles in water quality regulation, disease prevention, and sediment improvement.
Main Uses of Quick Lime in Aquaculture
1. Pond Disinfection and Harmful Organism Control
Mechanism: When quick lime (CaO) reacts with water, it forms calcium hydroxide (Ca(OH)₂), releasing substantial heat and raising the water pH to over 11. This rapidly kills wild fish, parasites, pathogens (e.g., bacteria, fungi), snails, and weeds.
Application:
Use 100-150kg/mu (per mu, 1m water depth) of quick lime dissolved in water for full-pond sprinkling before stocking seedlings in new ponds or during crop rotation in old ponds. Wait 7-10 days for safety testing before releasing seedlings.
Apply after clearing diseased ponds to reduce pathogen residue risks.
2. Water Quality Regulation and Environment Improvement
Stabilize pH Value: Quick lime neutralizes organic acids (e.g., humic acid) to prevent water acidification, maintaining pH at the optimal range of 7.5-8.5 for algae reproduction and fish growth.
Increase Alkalinity and Hardness: Calcium hydroxide reacts with carbon dioxide in water to form calcium carbonate (CaCO₃), enhancing carbonate hardness and buffering capacity to reduce pH fluctuations.
Promote Algae Growth: Released calcium ions (Ca²⁺) are essential for algae, optimizing the water algal phase and increasing dissolved oxygen (DO).
3. Sediment Improvement and Harmful Substance Degradation
Oxidize Sediment Organic Matter: The alkalinity of quick lime accelerates the decomposition of residual feed, feces, and dead algae in sediments, reducing the accumulation of toxic substances like ammonia nitrogen (NH₃) and nitrite (NO₂⁻).
Release Nutrients: It promotes the release of phosphorus, potassium, and other nutrients from sediments, providing nutrients for plankton and forming a virtuous ecological cycle.
4. Auxiliary Disease Treatment and Immunity Enhancement
Inhibit Pathogen Reproduction: By increasing water alkalinity, it suppresses the activity of acidophilic pathogens (e.g., bacterial gill rot, enteritis).
Supplement Calcium: Fish (especially crustaceans like shrimp and crab) require abundant calcium during molting. Quick lime serves as a calcium source to promote shell hardening and growth.
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