mystery disease

I'm kinda in a panic mode right now... My tank has been running for almost a year and since the start it has been doing quite well. But over the last week my fish start dying off at a pretty high rate. Little backstory, july 11 I did a little rescaping in my tank. I bought a few pieces of dry...

Upon getting the clownfish we treated with PraziPro for 1 week and a 5-day treatment of Ich-x. The clownfish were alone in the tank so they did not need to be qt. They were eating well and showed no sign of disease. Upon receiving the tang we did a freshwater dip, a 1 month qt separate from the...