Went into my local big-chain pet store (really the only option where I live) to get crickets for our geckos and thought I might get a small school of cory's to round out my community tank. Normally this store has nice, clean tanks free of any dead fish and the staff seems pretty knowledgeable. Today, however, many of the tanks were cloudy and I could see lots of detritus floating around in them. I asked one of the staff about it and she said their filtration system wasn't working right so when the fish stir up the substrate the muck wasn't getting filtered out. A few of the tanks had dead fish in them and there didn't appear to be any water flow in many of them. The spotted Cory's I was interested in seemed healthy, but I had one of those gut feelings and decided not to purchase them today. Did I do the right thing? Would it have been ok to purchase them anyway or is this the sort of thing that might have been adding additional stress on them? I'm just not sure if I overreacted or if things would have been fine had I brought them home. Anyone have any input?