Can't use salt because of cories. Bought a new heater--same wattage (100 watts, 26 gallon bowfront). The other one was strong enough to heat the water but had an upper level governor on it so it wouldn't overheat the tank.
I've found a LFS where the woman is truly knowledgable and takes all the time I need to answer my questions. She suggested half doses of the ich + stuff and a copper thing, with a second half dose four hours later, and PWC every morning with titrated doses on days two, three, five, etc. So we'll see.
Luckily my plants are mostly water sprite, and they are inexpensive.
Thanks for the help. I'll keep you posted. So far the only fish that died was the gourami that brought the stuff to the tank in the first place.