Direct Quotes from
Axolotls - Breeding Axolotls Successfully and
Axolotls - Rearing from Egg to Adult
"Assuming the eggs are fertile, the majority of the eggs should hatch if kept in well-aerated water. An air pump and air stone at one end of the tank will be helpful, just be sure it doesn't cause vigorous water flow. At 20 °C (68 °F) the eggs should hatch after about 17 days. Have a look at the Embryo Series Photo Log for a daily photographic account of the development of some white eggs."
"Newly hatched axolotl larvae can vary in size from 10-13 mm (roughly 0.5 inch). On hatching, they will still possess some egg yolk in their stomachs (the white substance that should be quite visible to the naked eye). Until this is used up they will be motionless and won't require food."
Within 24-72 hours after hatching, they will require food. From this point until they reach approximately 20 mm in length (a little under an inch), their diet must consist solely of live food items of a very small size. They will ignore dead food until they have grown significantly.
"As explained earlier, at this stage the larvae usually won't eat because they're still absorbing the yolk from their eggs. You should be ready with your chosen first food. I normally have some Daphnia in the tank a few days before hatching in order to have lots of little tiny young Daphnia present when needed. The larvae can get air bubbles in their stomachs if not fed early enough, but these will be expelled once they start to feed.
