Juvenile Emperor Angel issue


New member
Hey everyone,

I have an issue with my Emperor Angel I'm hoping to fix before it becomes too late.
I have had the fish for about 10 days in a quarantine tank, it has been feeding well on nori, pellets, flakes and mysis. It's colouration has been fine too. It has also been through one round of Prazipro with no issues.

As the final part of my QT process I am putting it through TTM, I transferred the fish yesterday lunchtime. This morning I found it stuck to the intake for the filter, it is pale, very lethargic and seems to be breathing very heavily.

I used fresh saltwater, temperature is fine, parameters are good. I'm at a loss at what could have caused a seemingly healthy fish to go downhill so fast after one transfer?