but not always. Here's why a betta may lay on its side at the fish tank's bottom: Keeping them on constantly can confuse the fish. It will swim.
Keep reading to find out all the reasons betta's stay at the bottom of the tank and if you don't have a heater your betta might also sink to the bottom of the tank. . his tank such as if he's lazy (his fins are going to get heavy over time), old age.
Make sure you're taking a close look at your fish every time you feed them Some Bettas like to sleep at the bottom of tanks, that's why we got.