Agree, mostly. I used just heat - not a fan of adding salt as I have corys and loaches.
If you raise the heat make sure you increase aeration. If you have a HOB filter, drop the water level so there is more splash, or add an airstone. Just watch them as you raise the heat to see if there are any adverse reactions. Make sure you keep the heat raised and do water changes with good vacuuming consistently and for at least 10 -14 days.
I've beaten ich with just heat. Remember when you lower the heat, do it gradually.