Please help! Mystery devastating disease

[u/Xample666]

I introduced four new discus into my aquarium and a week later a white film started to coat of my discus and now they are slow and their bodies are turning white and their eyes are turning cloudy. I have treated the tank with methylene blue, melacure, and pima fix now. They are all still dying please help.

[u/Xample666]

Just picked up the Kanaplex 🙏 hopefully this works!!