What conditioner do you use when replacing the water in a fighting fish tank?

Fighting fish, also known as betta fish, require specific water conditions to thrive. When changing the water in their tank, it is important to use a water conditioner that removes or neutralizes harmful substances like chlorine and chloramines, and adds essential minerals such as calcium and magnesium. Some conditioners may also promote fish health by stabilizing pH levels and helping reduce stress. It's best to choose a conditioner specially formulated for fighting fish tanks to ensure their optimal well-being.