First two weeks at 86f 1 teaspoon of salt p/gallon, then the last 16 days at 91.5f & 2 teaspoons of salt p/gallon, ich won't succumb to method, ich hasn't got out of control since discovery, I thought I was beating it since it had been 4 days since I last saw flashing & 6 days all fish spotless, but today found one spot each on 2 fish, have 12 fish total, why won't it die? Please help, I refuse having to use meds