Hi I am in need of some opinions in regards to an unwell bronze cory of mine. Currently I am just making a bunch of semi-educated guesses... The reason I am posting this here is that I thought I would get a broader range of opinions, as I am really concerned about the little guy. He has been sick since Wednesday, Symptoms are: -no obvious marks on his body that I can see -not eating -basically sits upright in one position, with the occasional shift (either beside his log or under his log) -he is breathing heavily all the time -I though it looked like he was getting skinnier but I am not really sure about that now, sometimes it is just the way the light hits him in the tank. -nobody is picking on him, in fact his friend comes to sit beside him regularly, as well as the little panda I have. -the sides of his body appear darker than that of his friend, again, this could be a trick of light since I never see him at the front of the tank. So far I have been preforming daily water changes of up to 25% total (I do a small bit in the morning and evening) Vaccum up a bit of waste from his tankmates but no aggressive vaccuming. Am using Prime for water changes. All parameters are good. Temperature is constant 25-26*C. Nobody else is having any issues. Thought if he is stressed I would try and keep things nice and clean, usually I do a water change once a week.(of 30-40%) LFS says to isolate him and add some salt to his water! I always thought that salt was bad for cories and rather old school, but the LFS has very healthy fish so their advice is confusing. I don't know about this, the only other change in the tank I have made was turning up the airstone to maybe get some more 02 in the water. What would you do?