[DirtyDawg10]

This is directly from the Ich article:

Temperature

Any temperature elevation will help speed things up. Temperatures at or above 86*F are generally considered to be fatal to ich. I have read a couple of articles that cite strains of ich surviving temperatures as high as 90*, but this is very rare. So if you are comfortable with 86* go to that point, if you aren’t at least go to 82-84*. Remember what type of fish you have when considering how high to go. Warmer water does not carry oxygen as well as cool water. Fish that prefer high O2 levels, will be more affected by higher temperature...
...Temperature should be raised 1-2 degrees per hour at the most until the desired temperature is reached. Drastic or rapid temp changes can be stressful to your fish.

Salt

To add salt, mix it in small volumes and add to your tank. It is not recommended to dump salt in directly as a solid. My method is to mix it with a bucket of tank water and siphon it into my filter with a ¼ airline. This ensures it is mixed, and adds it slowly to a high flow area to be further mixed as it enters the tank. I add ¼ tsp. per gallon once an hour for four hours. This brings me to a level of 1 tsp. per gallon in four hours. At this level, I am far more relaxed and will generally increase it to 2 tsp. per gallon in ¼ teaspoon increments every 3-4 hours. I always watch my fish closely for reaction. Once I am above 1 tsp. per gallon, if I see signs of increased stress I will slow things down and allow my fish more time to adjust.
Whatever method you use to add salt is fine, but raise the level slowly and mix it well. It will be easier on your fish to do so.