[danny zubot]

I'm really sorry about your problem Scott. The bad new is that the Ick has probably been there all along. As to why the goby doesn't have ick is a mystery to me. I believe that many sand dwelling fish have either a higher immunity to this parasite, or the parasite is not interested in them because they are sand dwelling. The life cycle of ick should only be a couple of weeks, if no fish are present they will die off in this time. If even one of the parasites hosted on the goby thats all it needed to propogate its species, and they are resiliant.

You will need to quaranteen the fish; even the goby, for 4-6 weeks and perform hyposalinty treatment. Medications such as kick Ick don't work, I know from experience because I'm going through this right now. You will need to leave your tank fallow for 4-6 weeks to ensure the tank is free from the ick bug. You only need a 10 gallon tank, a cheap heater and some kind of filter or powerhead.

Good luck, I feel for you man.