I noticed at the start of the week/end of last week, I can't remember the exact day, that the dark Betta had white spot, fins and body covered in little white dots so I've been doing daily water changes of 75%, turned up the heat and added some aquarium salt in. I am making the assumption that he was the first one to start with it but it could easily have been the white one because there's no chance of seeing it on him. After a couple of days it looked like things were improving, there was less white spot visible, the fish looked a bit happier again and I was optimistic. I'm still doing daily water changes and keeping the heat up as I've read on here to do it for 2 weeks so I was fully committed to that. Then it returned with a vengeance, the dark one was really covered and I saw it on the red and white one's fins for the first time. Since then they all look thoroughly miserable but it's the white one I'm most concerned about. I noticed the other day he had had a chew on his fins, I could see blood in them, but wasn't overly concerned as I just assumed if they were itching because of the white spot he might have tried to get rid of the itch. I've come home from work and he has a raging fungal infection on his dorsal and tail fins, it looks like someone has stuck cotton the wool on him. I initially thought one of his pectoral fins was gone but it was just clamped to his side. I don't know what to do now, will the treatment I've been doing for white spot work or is this exacerbating the fungal problem? Do I start looking at actually medicating the tank? I will get pictures when I get home, I spotted it just as I got the dogs ready for a walk.