After the arrival of May, it's essential to maintain a proper water change and fertilizer cultivation. Every month or every 20 days, it's recommended to use "bait" and "liquid medicine" to prevent and treat pests and diseases effectively. During the transition period between summer and autumn, special attention should be given to water quality management. Avoiding issues like "water turning" or "old water" is crucial. The water should maintain an appropriate level of transparency depending on the species being farmed. For fish ponds, the ideal transparency is around 25 cm, while for shrimp ponds, it should be between 30 to 36 cm, and for crab ponds, between 35 to 40 cm. If the water becomes too turbid, lime can be applied at a rate of 5 to 7.5 kg per acre to improve clarity. Additionally, fertilizers should be adjusted based on the nutritional needs of the aquatic species.
In terms of feeding, it's important to feed properly to promote growth and fat accumulation. Starting from autumn, fish, shrimp, and crabs should be fed with high-quality bait to enhance their health and quantity. Fish should be fed 5 to 6% of their total body weight, while shrimp should receive 7 to 8%. A significant portion of the diet should consist of protein-rich feed—about 60% for shrimp. Crabs should be fed daily, with about 10% of their total weight in food, and 65% of that should be protein-based. Carp should be fed around 6% of their total weight, with all of it being protein-rich. From October to November, as temperatures drop, feeding amounts should gradually decrease. Daily feeding rates should be around 3% for fish, 4% for shrimp, and 4 to 5% for crabs. Trout should be fed approximately 4% of their body weight.
Disease prevention is also key. Every 20 days after the start of fall, non-hazardous drugs such as chlorine dioxide should be used to treat the entire pond. In cases of illness among shrimp or crabs, 200 grams per acre should be applied once daily for 3 to 4 consecutive days. Additionally, supplements like "removing nutrients," "calcium tablets," and "terracillin" can be added to the feed once a month, at a ratio of about 0.5 parts per thousand. It's important to observe the feeding behavior of the aquatic animals twice a day during patrols and adjust the next day’s feeding accordingly. Lastly, ensure that "two defenses" are maintained—preventing theft, escape, and predation.
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