Hello guys. So, Lux has finrot. My mom took me to Petco and bought me some Bettafix. I was reading about it online but a lot of people were saying that it's really bad and that I shouldn't use it and then other people were saying that it was amazing. Which one!? Is it good or bad? Please help me. I don't want to end up killing Lux. Can someone please please help me? Thank you so much!