Prepare suitable artificial seawater seafood and aquatic products. After reaching the destination, clean them first, and remove the dead, heavy and sick ones before cleaning them. The cleaning method is to clean seafood 1min with fresh water or 1ppm potassium permanganate solution or disinfect with 0.2ppm bactericide. If the city tap water is used as the water source for raising seafood, it must be exposed to the sun or dechlorinated by chemical methods before use. The dechlorinated water is adjusted to the required salinity with deep seawater or solid seawater to make artificial seawater, which can be used to store seafood.
Water temperature is an important factor in seafood preservation, which is generally controlled at the lower limit of the appropriate temperature range to slow down its metabolism. The suitable water temperature of seafood is generally kept at 18℃- 15℃. When the temperature rises, the oxygen content in water will decrease, which will affect the change of water quality and cause hypoxia. The increase of water temperature will also promote the growth and reproduction of bacteria in water. Therefore, when the temperature is too high, it is not good for the biological body, and it is easy to cause diseases and losses. When the water temperature is too low, it will affect its survival rate, so try to raise the water temperature.
Fish, shrimp, shellfish, etc. Breathe dissolved oxygen in water through gills. If the floating head is found during storage, there is no oxygen in the water. Generally, the dissolved oxygen content in seafood water should be kept above 5 mg/L and below 3 mg/L, which is not suitable for fish survival. The content of dissolved oxygen in water is related to storage density, the amount of organic matter in water and air pressure. Therefore, the dissolved oxygen content in the water can be improved by improving the water quality, configuring the aeration device, increasing the number of water changes, reducing the storage capacity, increasing the illumination time, and filtering the water in the temporary storage tanks (tanks and tanks) by using the water circulation system.