Treating Ich I Need Help

table salt you dont want to be adding that use aquarium salt

or buy some ich treatment

 

Is it the heater or fish why you can't raise temp.
Salt only works if you raise temp aswell. The salt method dosn't always work.
Also salt depends on which fish you keep. Not all fish tolerate it to well.
Household salt fine in small doses.

How many gallons is the tank.
How many fish and which type.
Water stats in ammonia, nitrite, nitrate, and ph.

I would buy a whitespot med. Whitespot can be a fast killer once it infests the gills.