Normally, I would recommend the tang go into a hospital tank for treatment, but you don't one. I would think about setting one up. Its the only way to introduce healthy fish in a display tank---by avoiding putting sick fish in directly, they go into the quarantine tank first.
See if the LFS has selcon or zeocon, and get a glove of fresh garlic from the grocery store if don't already have some.
What are you feeding your fish?
See if the LFS has selcon or zeocon, and get a glove of fresh garlic from the grocery store if don't already have some.
What are you feeding your fish?