First, I may have over reacted a bit, but I did think it was unnecessarily dirty. Second the guy was trying to sell a grouper (panther I think, not too familiar with them) and it was struggling breathing and lying on its side, also it had some kind of open sore on one side. The guy was saying that was normal for groupers. Again not too familiar with this fish, but I do think the person buying it need bigger than a 29 gal.
I am glad to hear you have has success going there. Maybe after awhile, so they have time to clean the place, and I have had time to cool down from the experience, I may go back, but no time soon.