I've seen no signs of stress such as not eating, hiding, dull colors, or any difficulty breathing. As far as the emotional response I think the heat raises aggression levels. That's just the impression I get from watching the tank and have no other basis for my opinion.
And for salt, my impression from reading is that it being necessary depends upon the strain of ich that you are dealing with. Seems some may be heat resistant and some slightly salt resistant, but supposedly none are both salt and heat resistant. My initial plan was to get salt levels up to 1.003 as that is where I've read salt is effective against the parasite. Since everything seemed to be getting better at just 1.001 I didn't see the need to raise levels any higher since I wasn't sure how tolerant the tetras and pictus cats would be.
And for salt, my impression from reading is that it being necessary depends upon the strain of ich that you are dealing with. Seems some may be heat resistant and some slightly salt resistant, but supposedly none are both salt and heat resistant. My initial plan was to get salt levels up to 1.003 as that is where I've read salt is effective against the parasite. Since everything seemed to be getting better at just 1.001 I didn't see the need to raise levels any higher since I wasn't sure how tolerant the tetras and pictus cats would be.