Detailed Guide to Pearl Grouper Hatching Technology: Master the Key Points to Increase Hatch Rates
SummaryBefore releasing eggs, the water must first be fertilized, then carefully selected eggs are released, and plenty of bugs as well as a good-quality survival and hatching environment must be prepared for the fry. During hatching, pond water quality and water temperature must be well maintained, moss must be prevented and cleaned up in time, and sufficient feed and bugs must be added to ensure the fry take in enough nutrition. On rainy days, even more attention must be paid to changes in water quality; when adding water, special periods should be avoided to prevent pond-bottom contamination and enteritis.
1. Fertilizing the water
Before preparing for hatching, the first thing to prepare is fertilized water. You can use “Fertilizer Water Peptide” and “Probiotic Plus III + Sanhuan Vitality Source - Fertilizer Water Type” to get the water fertilized. After that, you can use products such as “Vitality Carbon” more often to stabilize the water, and try not to fertilize the water again, so as to provide a high-quality site for releasing eggs.
2. Releasing eggs
Before releasing the eggs, first use polyorganic acids to detoxify the water in the cage net. Select high-quality fish eggs and find the appropriate time to release the eggs. After releasing the eggs, in order to help the eggs survive and hatch better, you can use “Probiotic Plus” to purify the water quality in the cage net and remove odors.
3. Cultivating bugs
In order to have a large number of small bugs after opening the cage, you can use “Feed Probiotic II + Aquatic Feeding Attractant Yeast” two days before opening the cage to cultivate bugs. The method of use is small amounts but many times, which can greatly increase the number of growing bugs. It not only has a good water-stabilizing effect, but can also serve as an opening feed and will not pollute the pond bottom.
4. Precautions before and after opening the cage
Half an hour before opening the cage, sprinkle “Activate + Nutrition Express” into the cage net and pond to achieve an anti-stress effect. After opening the cage, it is still necessary to continue using “Feed Probiotic II + Aquatic Feeding Attractant Yeast” to cultivate bugs, stabilize water, and supplement feed.
5. Moss prevention and control
Moss has a relatively large impact on pond water quality and will hinder the hatching of fry. Therefore, before the fry are put into the pond, carry out moss prevention and control in the pond. During the hatching process, appropriately use “Bottom Dweller Safe” to control moss growth and provide a high-quality hatching environment for the fry.
6. Regularly stabilizing water
The stability of water quality directly affects the hatching of fry, so during the hatching process, it is necessary to continuously use “Vitality Carbon + Probiotic Plus III” to stabilize the water and ensure water quality conditions.
7. Feeding according to amount
During the hatching process, the feed intake of the fry must be ensured, and every day the fry should be fed according to amount with bugs that have been cleaned using “Super Peptide”.
8. Water quality management
Rainwater will affect water quality, so attention must be paid to stabilizing water both before and after rain. Before the rain comes, water stabilization and anti-stress measures are needed. During the process, pay attention to increasing oxygen and detoxifying. After the rain ends, closely monitor the condition of the fry to prevent gas bubble disease.
Water quality conditions are closely related to hatching results, so it is necessary to closely monitor water quality conditions and regularly stabilize the water. At the same time, sufficient feed and bugs must be ensured, and the number of bugs increased, to promote fry hatching. It is also necessary to note that the water cannot be too fertilized; if the water is too fertilized, it will cause the fry to suffer from gas bubble disease.
9. Preventing high temperatures
The development of fry will be affected by temperature. If the water level is too low, the water temperature will also rise, so the water level should often be appropriately deepened according to conditions. The deepest water level should not exceed 1.5-2 m, creating an excellent hatching environment for the fry.
10. Nutritional supplementation
The supply of nutrition will also affect the survival and hatching of fry, so during the hatching process, regularly use “Activate II + Nutrition Express” to provide sufficient nutrition for the fry.
11. Add as little water as possible
After the fry enter the pond, in order to ensure water quality conditions, if water needs to be added after releasing the fry, the water must also be disinfected in advance and then slowly added in multiple batches. When adding water, be careful to avoid the peak period of fry disease or special periods such as opening wings and closing wings.
12. Regularly clean the pond
In the middle and late stages of fry hatching, because the fry eat more, the amount of bugs fed will increase. Therefore, after feeding bugs, regularly use “Bottom Dweller Safe” to clean the pond, inhibit pollution at the pond bottom, and prevent fry disease caused by oxygen deficiency and changes in water quality.
13. Disease prevention
Regularly use products that can timely and effectively remove harmful bacteria to prevent bacteria from reproducing when large amounts of bugs are fed, which can cause enteritis in the fry.