My lfs says that fish can only be kept a few hours in bags and even goes to the trouble of having a tank of oxygen on hand in case people need to keep them in there for more than a few hours. I've heard on this forum that all fish bags are breathable in the dry part of the bag. I've also bought fish at auction that were in bags for the better part of a day with no problems. Are there some bags that do not "breath" at all, and why would a store use them as apposed to "breathable" bags?
