It started after a water change with fresh carbon added which apparently was a terrible brand. I was concerned I hadn't washed it off enough but I just kept rinsing and rinsing and that black dust just kept coming off! So I put it in my sump anyway and it looked like it was coming off in the water but I left it anyway.
I'm just not getting why there would be ammonia in the water because my tank has been cycled already and up and running for three years! I think if adding the three fish at once is what caused this problem with the biological load problem, wouldn't this problem have happened a few weeks ago when I first added them?
I don't know all I know is I am worried right now so much about the Wrasse. He's still alive in a quarentine tank but he looks awful and the ammonia is already started to spike in that, so I just did a 50% water change and used prime. Is there anything such as a fish vet maybe I could take him to to examine those injuries he obtained?
Stingrays are the best!