Assuming its ich won't get you very far. You should determine if it is in fact ich and then go from there.
Minor ich outbreaks can be easily treated by elevated temperatures (86-88) along with a 3 day blackout. NO salt or meds necessary. We do this at the shop when we get ich and so far we have 100% success rate.
Not all plants are high temp friendly, but most would likely survive a short window like that. It'd have to be a pretty minor outbreak for a 3 day heat cycle to kill it. Most heat treatment regimens call for at least a week, or 3-4 days after the last spot disappears.