After the rodent eggs are laid, the breeder can scrape them off immediately. If the eggs are fertilized, the breeder can choose to scrape them off gently with a knife or scraper, which will not damage the eggs, but also make them hatch faster. If it is unfertilized fish eggs, the breeder can brush them down with a brush to avoid moldy fish eggs and affect water quality after a long time. After the eggs are scraped off, small fish can hatch in about 2-3 days.

After rat eggs are laid, the breeder needs to isolate the parent fish first, then fish out the fertilized fish eggs and put them into a separate fish tank for hatching. If fish eggs stick to sunken wood or something, the breeder can take them out with a straw or blade.

After all the eggs are transferred to the hatching tank, the breeder needs to control the water temperature, because the water temperature is an important factor for successful hatching, so the water temperature should be kept between 24-26 ℃. The higher the temperature, the faster the hatching speed will be, but the maximum cannot exceed 26 ℃. During hatching, breeders should not only ensure clean water quality, but also ensure sufficient oxygen. If the incubation environment is suitable, fertilized eggs can hatch successfully in about 2-3 days. The newly hatched small fish do not need to be fed. After absorbing the vitellotin carried from the mother body for about 2-3 days, they can feed some cooked egg yolks or shrimp eggs in good years.