You said treated for flukes. What treatment are you using and how are you applying the treatment ( amount, number of days) ?Thanks. Just noticed that the other clown has it as well. All the fish are in the Qt being treated for flukes, which only the royal Gramma was suffering from. Related somehow?
There is no indication that this is an external issue, you only see this on the white, less opaque portions of the fish, so that tells you it is an internal issue - that medication is only for external issues, and doesn’t work well on marine fish, so you should not follow that advice.My LFS recommended NT labs FMG for koi. It's a mixture of formaldehyde and malachite green. I dosed the recommended 1ml as it's a 40l Qt, leave for 5 days, then 50% water change and apply again