Detailed Explanation of Key Points for Pearl Grouper Farming Techniques
Abstract When farming pearl grouper, pond construction should be well planned in advance, especially the depth of the pond and the water temperature control equipment, all of which need to be properly set up. In addition, pearl grouper has very strict requirements for water quality, and strict sterilization steps must be carried out to ensure the health of the pearl grouper. When stocking, the stocking density should be determined according to the size of the pond, and the fry should be as large as possible, as they are easier to raise.
1. Digging and building the site: The most important thing in the early stage of raising pearl grouper is to build the site reasonably. It is best to dig a deep pond of 1.5-1.8 m, and in order to simulate the seabed conditions, a layer of sand needs to be laid. Pearl grouper likes to rest on the sand surface. To allow pearl grouper to rest better, some aquatic plants can be placed in the pond. Since pearl grouper is relatively sensitive to cold, it is best to install equipment that makes it convenient to control water temperature when digging and building.
2. Water quality: Pearl grouper has very strict requirements for water quality. Once pathogens are present in the pond, it is very difficult for pearl grouper to continue surviving. It is best to strictly disinfect the pond before filling it with water. First, sterilize it with sunlight for about 15 days, then disinfect it with diluted limewater. After the water has been added, it is also best to expose it to sunlight for about 15 days, and add an appropriate amount of ammonium phosphate and urea to the water.
3. Stocking requirements: ”Select relatively healthy fry for stocking. It is best if the fry can reach a size of about 3 cm, as this can greatly increase the survival rate of pearl grouper, and the density for farming pearl grouper is not recommended to be too high. Generally, farming 300-350 fish per mu is more suitable. Too many may affect the growth rate of pearl grouper.