Another attempt at keeping a Blonde Naso Tang and another let down. This guy was at my local fish store for 2-3 weeks and was eatting at the store. His belly wasn't pinched, and seemed healthy over all. In some past attempts my other tangs would stress the Naso's which I assumed contributed to their deaths. So this time all the other tangs went on vacation in the sump when the naso was put in the dt. The first 2 days were good, the fish was eatting some not as much as I liked but figured he was settling in, then today when I got home I noticed he was breathing a little heavy so I watched him. He went from picking at alge on rocks to dead in 1 hour and 30 mins, symptoms went from heavy breathing, to gasping, to gasping at surface, to laying against rocks, to on his side convulsing, then dead. I noticed the white spot pictured went from pea sized when I noticed it to that at death. No other signs of damage/infections. The only tangs I have ever lost in this tank are nasos. I ve had sailfins, chocolates, yellows, scopus, and a purple tang with no issues. Currently all i have is the purple and chocolate tang. A common theme is the nasos seem not to eat well when put in the DT. They will pick at a little food but not enough. I can feed the exact food they ate in the fish store and they dont seem interested. What ever bacteria or infection is happening only takes out the nasos. Some last a month, some a couple weeks, this one died the fastest. The longest lasted 6 months. But they all go from seeming fine to dead over night or very quickly. This is my favorite kind of tang so any help is appreciated.