you never want to add MG or MB to your tank, it will kill your bio-filter. for ICK, heat above 86 for 3 weeks, or 2 weeks after you no longer see on the fish. some use salt, the salt is an irritant to the fish so it creates a thicker slime coat. but is not needed IMHO. I try to never use meds unless absolutely necessary as they can be hard on the fish. long term higher temps best cure, fish be fine in the higher temps, just hungry and a little more aggressive.