Powder blue is a love hate relationship. Beautiful fish but will break youre heart eventually. I tried 3 previous times buying new ones from lfs/fish runs. They eat and do well for a month or two. You leave the house for the weekend, you come back with powder with full blown ich. Dies and kills a few others along the way.
I was sure never again. I found a tank established one not too long ago. One more try. Same thing. Did fine for a while. Was gone for a couple of days last week. Came back to find same thing. Powder died the other day. Lost a bunch of fish and trying to do damage control. I still think I'm gonna lose a couple more fish.
Never again!!! Sticking with yellow and purple tangs