I wish I had found this post before....
I ordered some fish from LA. Flame Angel, chromis, cardinal, Blenny, and a longfin fairy wrasse. One cardinal arrived DOA.
I had my QT (10 gallon NUVO) set up for several weeks (3-4). Was ghost feeding some and would seed with a little water from DT. Probably a bad idea now that I think of it. Got ATO set up and even been floating a ball of cheato.
Fish arrived and I did the drip acclimation per LA directions and as I have with my other fish. Waited until the next day to dose with Praxipro and Cupramine. I had done both in the past without this issue.
Anyway, next day the fairy wrasse started laying on its side and breathing heavy. Tested water and notice ammonia spiked to 0.5-1 and nitrite was off the chart.
I had 5 gallons of fresh sw on hand so I started changing it out. Over the evening and next morning. Also added most of a small bottle of biospria.
Wrasse didn’t make it. Two days later and this morning my flame Angel has gone. Ammonia at 0-0.25 but nitrite is still 2-5ppm.
New water being made. Going to do a full WC.
I hope I don’t lose the others. I feel really bad as I think I just didn’t have a fully set QT tank biofilter and over did it on the medications. To hard and fast from what I have learned here.