Spring is a time of renewal, when nature awakens and life returns to the earth. Ornamental fish, too, begin to recover as temperatures gradually rise. During this period, it's essential to closely monitor their feeding habits, activity levels, mating behaviors, spawning processes, egg hatching, and larval development in order to create an optimal environment for breeding. Effective spring management of ornamental fish farming should focus on several key areas.
First, managing broodstock properly is crucial. Water changes should be done regularly—ideally once a week—to maintain good water quality and increase oxygen levels. Before spawning, broodstock should be kept in green water, and live food should be provided daily to help stimulate their reproductive systems. When signs of mating or chasing appear after sunrise, a controlled water change can encourage spawning. It’s best to move the broodstock into a clean, clear pool in the afternoon, so they can spawn the next morning.
Second, after spawning, water quality must be carefully monitored. If the water becomes cloudy or develops an unpleasant odor, it should be completely replaced by mid-afternoon. Fresh water should be added in equal amounts to ensure the fish remain safe overnight. If new fish cause stress and trigger another round of spawning, another thorough water change is necessary. If spawning continues on the third day, the water can be reused to stabilize conditions. The temperature difference between old and new water should not exceed 1°C, as sudden changes can harm the broodstock. Oxygenation devices can also be used if available.
Third, post-spawning care is vital. Broodstock are often weak after laying eggs, and frequent water changes can make them sluggish, reduce their appetite, dull their color, and increase the risk of diseases like white spot or skin congestion. To prevent this, they should be kept in green water or have some green water added to their environment. Increasing light exposure or separating males and females can help maintain their vitality. Fish with underdeveloped gonads should receive extra nutrition and be placed in a clean, green water environment to support their growth. Once mature, the first water change can be used to trigger spawning again. This method can continue throughout the breeding season.
Lastly, during spawning, male and female fish may show poor gonad development, especially in species like goldfish, where the abdomen appears full. In such cases, special attention should be given to their nutrition, particularly with live foods, to help mature the eggs. Spawning fish often eat less and for shorter periods. Therefore, feed should be reduced to about one-third to one-fifth of the usual amount, and the food should be consumed within 15 to 30 minutes. After spawning, feeding should start with small portions to test the fish’s appetite. Those that eat well can be fed more frequently, while others should be given smaller meals based on trial feeding. Proper feeding practices are essential to help the fish recover and prepare for future spawning cycles.
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