I must be missing something. My Red Sea 130 AIO has been setup as a mixed reef and running for about 10 months now. Initially had velvet with some fish and went fallow for 3 months. Newly introduced fish were quarantined and treated with copper. New fish did well for months in the DT and then suddenly died. Heavy breathing was the only symptom. Was able to save a clownfish by transferring him back to the QT after an H2O2 bath. After another fallow new fish, as well as the original clown, were reintroduced after quarantine. All did fantastic in quarantine. But, all struggled when placed in DT. Notably they all had fast gill rates after a few hours in the DT. Some have survived and look just great. Others, 3 springer damsels and a sleeper goby have not. I had a salinity mismatch between the display and QT that I thought killed the damsels. I adjusted that and after 30 days in QT I moved a sleeper goby to the DT. Looked great. Sifting the sand and swimming normally. 3 hours later the labored breathing started. After 5 hours it died.
Something is off here that I can't figure out. The fish that are in there now, a clown, green chromis, and algae blenny look fantastic. Is it just bad or weakened fish? Common denominator here is every fish did really good in the QT. No breathing issues upon introduction. As soon as they were in the DT they had issues. My parameters are all within range. Only difference between QT and display is with nitrate. QT has about 30ppm and the display has 0. Temp, SG, ammonia, are the same.
Just frustrated and taking the fun out of this as I'm afraid to put any more fish in this tank.
Any thoughts or comments are appreciated.
Something is off here that I can't figure out. The fish that are in there now, a clown, green chromis, and algae blenny look fantastic. Is it just bad or weakened fish? Common denominator here is every fish did really good in the QT. No breathing issues upon introduction. As soon as they were in the DT they had issues. My parameters are all within range. Only difference between QT and display is with nitrate. QT has about 30ppm and the display has 0. Temp, SG, ammonia, are the same.
Just frustrated and taking the fun out of this as I'm afraid to put any more fish in this tank.
Any thoughts or comments are appreciated.