Wanna buy these fish... Should I?

Hello all.

I have been looking at purple eye anthias in my LFS. Tank has about 20 in it. They all look pretty good. One is hiding- looks like it has pop eye. They are in a tank with some powder blues. I'm thinking he got hit. They say they have been there for two weeks and are eating.

My only question is- the tank water has a yellow tinge. Do you think they are treating the pop eye fish with meds? Should I stay away? I'd really like to buy 3 of them.

I have a 95 gallon corner with 3 blue/green chromis, two oce clowns, a flame angel and a cleaner shrimp.

Thanks