I know betta fish don't get alone but what if i keep one male and a female betta in a 75g gallon, given the large area to swim, will the male still chase female to death?
It should work, a 75g is a lot of room for them, just be sure to provide plenty of hiding places and plants
I plan not to add decors, and no aquatic plants. Only substrate and about 10"/21" high of water.