Orientalexpress
I am having the same problem for last 1 month, I have a new tank 125G almost 3 month old, finish the cycle, all parameters are OK.
Put the first batch of fishes 2 months back all fishes died except a Blue hippo tang. Then I put more every other week but they all died again.
Hippo is still alive and infact doing great with other pair of shrimps, and few crabs. First the fishes swim at 45 deg angel, then their eyes goes blurry and body shows lots of white stuff its dosent looks like ICK and then they died, this whole cycle finished in 12-18 hrs. I already made so many water changes that finish 2 buckets of salt in 4 weeks. I get fish from 4-5 different stores. Just dont know whats going on with my New FOWLR tank. I had kept fish before for last 6 yrs but never seen anything like this. I used RO/DI water, running a skimmer and a UV. sometime I think is it the UV causing this (bought from aquatrader in the Bay area).. may be something in this cheap plastic can ......