So I have my lionfish and the dogface puffer sitting in the same tank. About a week ago they both caught Ick and I treated it with some organic compound. Unfortunately, 2 days ago my heater thermometer broke and it heated the tank up to 29.5C (my regular temp is 26C). The temperature was reduced to normal overnight and a new heater was installed. The consequences are not pretty (the Ick was gone a few days ago also):
Puffer: Breathes very fast, doesn't show regular interest to food, today it is covered with some white layer of slime that comes off it in a shape of long white threads, the teeth (both top and bottom) are sticking out and the tongue is moving quickly inside the mouth, the top of its body is very dark also and it doesn’t swim.
Lionfish: Is not active at all, no interest to food, breathes VERY heavily and fast, and this morning I noticed a white/gray layer on his eyes….
Could you please help me and suggest me what to do? Should I do water changes? Any help will be greatly appreciated….. Photos of both fish are attached.

Puffer: Breathes very fast, doesn't show regular interest to food, today it is covered with some white layer of slime that comes off it in a shape of long white threads, the teeth (both top and bottom) are sticking out and the tongue is moving quickly inside the mouth, the top of its body is very dark also and it doesn’t swim.
Lionfish: Is not active at all, no interest to food, breathes VERY heavily and fast, and this morning I noticed a white/gray layer on his eyes….
Could you please help me and suggest me what to do? Should I do water changes? Any help will be greatly appreciated….. Photos of both fish are attached.
