without isolation? Zebrafish can also spawn without isolation, but it is easy for zebrafish to eat their eggs without isolation. Zebrafish usually spawn from the early morning to about 10 A. m., so breeders had better do a good job of isolation in advance, so as not to eat their eggs by mistake when zebrafish give birth in the early morning.
zebrafish need to prepare for spawning? First of all, prepare the fish tank for spawning. The best size is 25 * 25 cm. The water temperature should be controlled at 25-26 degrees. The hardness of the water in the fish tank should be controlled between 6-8, and the pH value should be between 6.5-7.5. Then lay a layer of nylon mesh on the bottom of the tank, or several layers of pebbles, so that the eggs of zebrafish can fall under the mesh or in the crevices of pebbles after birth, and will not be eaten by the mother fish.
If the water temperature is 24 degrees, it usually takes 2-3 days to hatch small fish. If the water temperature is 28 degrees, it takes 36 hours to hatch. It depends on the water temperature in the fish tank, the higher the temperature, the shorter the incubation time. Zebrafish can generally lay more than 300 eggs at a time, up to thousands. Generally, the spawning time is from the early morning to 10 am. After spawning, wait for 7-8 hours, and you will find white eggs, which are not fertilized and can be sucked out directly with a straw.
