My betta girl, Arora, was sick for about seven days, only laying at the bottom of the tank. I have her in a simple tank, since bettas are soft swimmers, and currents can make them depressed from having to fight to swim all the time. Anyways she just started being active again, her water temp stays between 75-80°F (24-26.5°C) and so I'm now scared to do a partial water change only because she just started eating and swimming again without my help.
Any advice on handling water changes without causing stress and further illness?