I believe that was because of the sudden fish additions of the sun catfish, bichir, and peacock eel.
Sounds like you didn't quarantine at all, so you may hacve introduced something.But I had done the water change before I added them. Could the sudden change have done it? This is the first time I've ever had something like this happen to me.
I actually was planning to change the stock. Take out the angels, take out the leaf fish, and take out the bristlenose pleco. I have a few 55 gallon tanks I'm setting up so they were gonna go in those.
You have zero nitrate reading?Just to prove it Right before my water changes the nitrites,nitrates, and ammonia always read perfectly. 0's across the tests.