While it is possible that the parents ate the eggs, or let other fish eat the eggs, take a close look around the tank. Attentive angelfish parents will often move the eggs. Look at other flat surfaces, both vertical and horizontal, for the wiggling eggs. You may find them stuck to the heater or sides of the tank.
Regimen: A plan or a regulated course, such as a diet, exercise, or treatment, that is designed to give a good result. A low-salt diet is one type of dietary regimen.
The definition of a regimen is a system of eating and exercising for improving your health. An example of a regimen is a daily practice of doing 100 jumping jacks each morning before you go on a three mile run. Rare the act of governing; government; rule. a particular system of government; regime.