One week ago, I brought home 5 kubotai. The next day, I treated them with levamisole hydrochloride. I can't say that I observed them too closely during that time, since I kept their light off, and they were skittish and hiding. So I don't know if this one kubotai was breathing so heavily right from the start or not.
When I did notice its very quick breathing, I tested my water, and the ammonia was at 1 PPM. I did a 30% water change and added Amquel to detox the ammonia. No change. Then I thought I noticed a few ich spots on some of the other fish's fins, and the panting one started scratching, so I increased my water temp. to 90 degrees. I dropped the water level for a good splash. The other fish are relaxed and breathing normally and have been the whole time.
I have changed 30% of the water each day, and I added lots of established filter material from another tank. The ammonia level hasn't changed, and the nitrites are still at 0.
Yesterday, I bought some PRIME and added that to the tank. The little fish is still panting heavily.
I don't know if he has gill damage or still a heavy infestation of ich. Or could it be gill flukes? He hasn't scratched since that first day that I noticed it.
I used the heat only method to kill ich once before when I started back into this hobby (obsession

ammonia 1 PPM
nitrite 0
pH 7.6
temp 90
Any ideas?
Thanks