The hatching of artemia cysts requires control of key conditions such as water temperature, salinity, aeration rate, and light. Here are the specific methods:
Hatching condition
Temperature: The optimal range is 26-30 ℃, and temperatures below 25 ℃ or above 33 ℃ may inhibit hatching.
Salinity: Typically, seawater with a salinity of 20-30 is used, and freshwater has a higher hatching rate.
PH value: maintained at 7.5-8.5, can be adjusted by adding NaHCO3.
Inflation volume: Continuously inflate to keep the water rolling, avoid dead corners, and maintain dissolved oxygen at around 2mg/L.
Operation steps
Selecting cysts: Choose cysts that are dry, have uniform particles, and consistent color, avoiding round wet cysts or empty cysts.
Soak and absorb water: Soak the artemia cysts in fresh water for 1 hour, with a recommended light intensity of 2000 lx (artificial light source).
Hatching environment: Place the cysts in a 28 ℃ constant temperature water bath, continuously inflate and maintain stable salinity.
Light management: Provide 24-hour light during incubation period, the brighter the light, the more favorable it is for hatching.
precautions
Avoid high density (recommended 1-3 grams per liter) to prevent larvae from being injured due to excessive inflation.
The incubation period usually does not exceed 24 hours, and an excessively long incubation period may result in aged cysts.
After hatching, it is necessary to promptly separate the larvae to avoid adhesion