definitely the worst looking water I have seen in a tank. If it's not ammonia burns it could be heater burns. 80-90% water changes every 1-2 days, Stress coat, and salt, then Melafix once your water has good parameters, is my advice. DOn't forget to use Dechloriniator every water change, chlorine and chloramine will only make the burns worseNo offense man but your water looks terrible, something like that would take quite a while to get that bad.