Sorry to hear about the tang. Keep your head up, I have had some painful experiences in this hobby as I'm sure most of us have, but we are here as a community to help and that is inspiring. I have a cool little hippo that had ich initially and was treated with hypo. Take your time and get another, it's the best thing you can do right now...but find another supplier. Start with a nice healthy specimen that eats. Having an ich treatment like copper (& test kit) ready is also good. As you probably know, you'll have to drain, rinse and dry out the qt
to let whatever was in there die off. Sounds like they are coming to you with more than ich from that lfs
; ich shouldn't kill in 2 weeks (if it was already advanced, you would not have bought him). Anyway you need to get a good fish to begin with, qt
, give him good water quality and plenty of swimming room (and hiding places), offer a variety of food (they do not take long to eat) and you will be rewarded with a happy & healthy tang!