Hi Melypr, I see that you are the go to member when it comes to tank disease issues. Just a question, have you ever used Dr. Tim's one and only? I do read a lot of people recommend it and also know that he used to work for instant ocean before getting fired after inventing bio spira.
To me, I have used all types of beneficial bacteria on a bottle products (Cycle, Dr Time and 2 other products that I can't remember the name) when I was desperately trying to get nitrates down when I first set up a hospital tank on a fly. All I ended up doing was a major water change (80%) to get the toxics out of the tank literally, fishes were trying to jump out of the QT tank.
I was so disappointed at Dr. Tim's product since it was so highly appraise online. ALL my perimeters stabilized within hours after I used Bio Spira by Instant Ocean and no I am not here to promote the items. It is so amazing that I did not have to make a water change for a month after introducing it to my QT tanks
Just thought I let it out there, sorry if this sounded intrusive.