It is normal for betta to defecate every few days.

Once a day is normal, depending on how much you eat. Half-moon betta is a tropical ornamental fish originated in Thailand. It has a unique breeding method, can live in swamps and ditches, and can be raised at home. Generally, adult fish are 8 to 10 cm long. Thai betta is a famous ornamental fish and one of the most commercialized tropical fish. Although fighting between males of Thai betta fish is easy to happen, and betta fish can't be kept in mixed tanks with other ornamental fish, it has high ornamental value.