Update
I pulled all my fish out last Tuesday night/ Wednesday morning and did a peroxide bath then put them in copper power quarantine tank. Last night the Royal Gramma from my video finally passed( he was the only one with noticable white dots, and he had been looking dreadful the last few days.)
The rest of the fish are stressed out from being ripped out of the DT, but are all eating and look otherwise healthy. Even the blenny who was the first one to stop eating and show symptoms.
My question now is, should I add kanaplex to the QT? Or just leave it only copper power? I ask because the gramma was covered in open wounds and I am worried the others may have open wounds that will fester if not treated.
Thank you all for your advice and help so far, I think all things considered this has gone fairly well. I look forward to hearing your opinions on where to go from here.