Greg@lionfishlair, Remember my post about the foxface a couple weeks ago? Well I think its spreading. Can it spread? Let's assume I have some kinda internal bacterial infection going on in my tank causing fish to not eat and eventually perish. All of my fish are in a dedicated 55 gallon QT being treated with cupramine as I write this to eradicate ich and velvet. (I decided to start using the QT route) That being said I have 2 75 gallons that are fishless at the moment. Running as usual waiting for the 72 days to pass. Now if I buy: Maracyn Plus Bacteria & Fungus Medication: Mardel Maracyn Plus at Foster & Smith Aquatics Should I treat both the 75s with no fish in them? Can this bacterial infection live in a tank without fish for 72 days? Will this medication harm my new live rock I just got from floridaliverock.com? Before treating the 55 gallon I've read I should remove the copper first with a nice water change and carbon. Please help, Jerry I sent this message to greg but it acts like it didn't send. Just gonna cover my butt and make a thread about it. Anyone can chime in please.