(8)Food - Bettas eat a good variety of foods and also do not know when to stop eating. The best staple for you to get in for welcoming your new fish home is betta pellets, one such brand being Betta Biogold. These are specially formulated and should be the main source of food. Bloodworm, daphnia, etc can be fed as treats, once maybe twice a week, it is not good as a staple as is one of the main known causes of causing constipation in bettas. Also a very good habit to get into once a week is feeding a cooked deshelled slightly crushed up pea, these are good to help their digestive systems. Peas are also used when a betta gets constipated, the method of using is to feed a pea and then starve the next day this should hopefully clean them out (in severe cases may need to repeat). Any food that is uneaten remove from the tank as this will foul your water.