Are your bettas eggs dead when they fall to the bottom on gravel?

Not necessarily. Betta eggs are very delicate and can easily be damaged if they are not handled properly. However, if the eggs have fallen to the bottom of the gravel and are still intact, they may still be viable. To increase the chances of the eggs hatching, you should carefully remove the eggs from the gravel and place them in a clean container filled with water from the betta's tank. The container should be kept at a temperature of around 82 degrees Fahrenheit, and the water should be changed daily. If the eggs are viable, they will hatch within a few days.