mandarin dragonet sick and dying

hockeygolfer9

New member
Last week I got a Royal Gramma from my LFS. After drip acclimating it I put the fish in the tank and it immediately went into hiding. I did a 50% water change 3 days later and I know the fish was still alive then. A couple days after this I saw my hermit crabs eating the dead Royal Gramma. About a day before this I noticed my Mandarin fish was gasping for breath. He was still eating and swimming around this time so i figured he was just stressed from the water change. After the Gramma's death his gasping got worse, he stopped eating, and I noticed a couple semi transparent skin tags on him. When he continued to get worse I took him and my small clownfish out of my main tank into a quarantine tank. The clownfish seems to be doing fine but the mandarin has looked on the brink of death for several days. I finally decided to do a freshwater dip (I'm aware this is bad for the mandarin due to their slime coat) because I suspected it may be gill flukes. I did not see any parasites falling off him in the water. He is not back in the quarantine tank and is in bad shape. I figured he was a goner a couple of days ago. At this point I just want to figure out what is wrong with him so I can have a chance to save my clownfish if he falls ill. The mandarin is particularly hard to diagnose because of his vivid coloration and thick mucus. I did not notice anything on the Royal Gramma before it dies, but it also spent all its time hiding in the live rock so I never actually saw it up close. The mandarin fish now has white in the iris of his eyes, they are not cloudy but a bright white and is gasping rapidly at the bottom of the tank.
 

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Have you tried testing for ammonia? That seems to be a big culprit for difficulty breathing. Do you have good water disruption at the top to exchange gas?
 
Looks like uronema marinum which is hard to treat. It's going to be even hardier in a QT to keep him living. I am quite sure your QT does not have the sufficient population of pods to sustain a Mandarin. Good Luck!
 
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