:goodpost:
I have always had my bettas in a 10 gallon and they thrive. The tank perimeters have always been good and the plants are also a great help. My current boy got downgraded to a 2 gallon temporarily (he has some fin rot and I am treating it) and he doesn’t seem pleased with such a small...
I wouldn’t suggest getting any other fish as a male betta may kill them depending on his personality. A few plants would be nice for a 2.5 gal and maybe a zebra nerite snail.