I almost lost my Hawaiian Yellow Tang this week. I saw it spinning around in the corner of the tank Monday afternoon with tearing or damaged fins. I was lucky in catching it and put it in my quarantine tank. The tang went horizontal and spinning around endlessly on the bottom of the hospital tank. Its whole body was rigid and really couldn't control its body orientation and direction.
Because of the damaged fins and the fish looked it was dying, I put some Melafix in the water and hoped for the best. Monday night was the worst for the fish. Just watching the tang spinning horizontally and endlessly was exhausting to me. I didn't expect it to live thru the night
Tuesday morning the fish was still alive! but not much better. I did a 30% water change with water from the main tank. Gave another dose of Melafix. Did another water change in the evening.
Wednesday morning - the fish finally stop spinning and was able to get upright part of the time. I did another water change and gave another dose of Melafix. In the afternoon, the fish was fully upright. I tried to give it some seaweed and it started eating it. I now think the fish might have a chance to make it.
Thursday - the tang is doing a lot better and kept on eating the seaweed that I put in a clip. I gave it some mysis shrimp and it ate them all. The fins are all healed up and the body is once again flexible and it can swim easily in both directions.
Today, I decided to "discharge" the tang from the hospital tank and back into the main tank. I went thru the same acclimation process to re-introduce the fish into the main tank. It went hiding immediately. I was still able to see it with my flash light (the lights were not turned on yet).
20 min later, I saw the tang's top fins started to split. I did not see any fighting between the tang and other fish. It could be due to the stress related to moving.
My question is: do Hawaiian Yellow Tang split their fins under stress? Anyone got a sick tang and then recovered like this. My past experience with sick fish has always been 100% fatality. This is a success story, I hope.