Detailed Explanation of Fish Fry Rearing Methods and Technical Key Points

Fish farming can now be said to be a relatively popular industry for making money through breeding, so many people have started to explore other paths around fish farming, and fish fry rearing is one of them, and it is also very important for fish farming. Because we all know that if you want to raise fish, you must first have fish fry. Many people buy fish fry that cannot survive, or various problems arise. So what is the correct method for rearing fish fry? What Qinnong Web wants to share with you today is about fish fry rearing methods. We hope you can benefit from it.

1. Selecting and Cleaning the Pond

Generally, the area around the fish fry pond should be relatively solid. Next, its water retention performance should be good; it cannot be like a funnel where the water leaks out as soon as it is added. Next, it should be close to a water source, which makes draining and filling water convenient. The fish fry pond should be chosen in a place with sunlight and also shade. Finally, the water in the fish fry pond cannot be higher than 80 cm; generally it is about 60 to 70 cm. Before putting in the fish fry, we need to clean the pond thoroughly, remove the silt and some debris from the pond, then spread a layer of quicklime to disinfect it, and after the bacteria have been eliminated, add water and put in the fish fry.

2. Selecting and Releasing Fry

If the fish fry are selected well, then their survival rate will be high. So how should we select fish fry? First, put water into the container used for raising the fry and then keep stirring it. If the fish fry can still swim freely in the water, then that shows it has a very strong ability to adapt to the environment and is relatively healthy. Another method is to put the fish fry into a basin. If they swim relatively briskly in it, and after the water is poured out they struggle violently, then they are good fry, because they have a strong desire to survive. When releasing the fry, first feed them until full, and then put them into the pond. They need to adapt to the environment again, so they will not eat for the first few days. This is also why they need to be fed until full before release, to avoid them starving to death because they cannot forage in time while adapting to the environment.

3. Putting in Food and Feeding Bait

Newly born fish fry basically do not need to rely on external food. After the fish fry are three or four days old, we need to feed them. When feeding, we generally give them some insects and special feed for fish fry, and also some plankton. So what contains these insects and plankton or microorganisms? If in rural areas, it can basically be seen everywhere, that is, pouring the water from a manure pit into the pond. If farming in the city, then you can only feed cooked egg yolk. When the fish fry grow to four or five cm, we can switch to feeding various kinds of rotifers.

4. Changing Water

Generally, we change the water because the water quality in the pond can no longer meet the conditions for the growth of the fish fry, or because after a new round of fish fry has hatched. Since the bait fed each time cannot all be eaten, there will always be some left over, accumulating in the pond and causing water pollution, or even making it stink. This affects the growth quality of the fish fry. However, when changing the water, it does not mean replacing all of it. We need to leave a portion of the relatively clean old pond water, and then add two-thirds new water. In this way, when releasing them, the water will still contain the microorganisms and plankton that the fish fry need, making it convenient for them to forage on their own.

5. Density

During the growth process of the fish fry, there will gradually be more and more fish fry in the pond. So we need to divide them into ponds according to the size of the fish fry and their growth characteristics, in order to increase the pond density. We can carry out selection three or four times. That is, first we can sort out the fish fry that are already large enough. The second time, we sort out those with relatively strong vitality and relatively high activity. The third time, we sort out those considered to have more difficulty living. What remains are those that are relatively small and still have fairly good vitality, so they can continue to grow and reproduce, while the others that have been sorted out can also grow in another environment. In this way, the original pond's rearing density can be kept scientific, and at the same time you increase production and can earn more money.