I have recently lost a Lion fish and have a second one in deep distress. Neither showed any signs of illness and there are no signs of aggression between any fish in the tank. The Lion fish have been in the tank 7 and 8 months, I am not sure if they were wild caught or tank raised. The fish share a tank with 4 other fish none of which show any negative signs or signs of illness. The first was simply found belly up on the bottom of the tank one morning. The second more recently was on the bottom on its side with signs of trouble breathing. It has isolated and treated with Ionic copper as recommended by my local FS but not looking good after 6 hours of treatment. There are no signs of ich, spots or loss of color. There also has been no sign of loss of appetite until now.
The tank is a 250 gal
with a 50 gal
sump. Filtration occurs by dripping through dry media first, then through live rock. The sump had a protein skimmer and returned to the tank by passing through UV
sterilizer first. The water checks out perfect. The main tank has not been treated with any meds as this time.
Any help would be greatly appreciated?