I'm glad you took a look over this, I read that last night and ended up focused on the fact that he had already started hypo then forgot to ask for clarification
You are doing great here, I just want to make sure we’ve ruled everything else out.
To the OP... were these fish in QT because they are new, or something you’ve observed in the DT? You mentioned you are letting your DT run fallow, the backstory there might be helpful