Embryos can also be raised 25 per 35 mm petri dish if the water is changed daily, although this method does not provide for optimal growth. Placing the beakers in a constant temperature water bath and covering them with watch glasses provides steady conditions. The embryos normally hatch after about 3 days of development but do not need to be fed until 4 days after fertilization. At that time, feed the larvae live paramecia or other microorganisms which can be prepared as an infusion.
Most pet shops sell infusion materials for feeding baby fish.
Paramecia raised in a mung bean culture reduce the chances of infection. As the larvae get larger, they can be moved to bigger containers. Keep 15-25 embryos in 100 ml system water in a 250 ml beaker. Placing beakers in a constant temperature water bath and covering them with a watch glass provides steady conditions for accurate staging. Embryos hatch in between 2 and 3 days.