Yeah. I was once told a koI would be okay in a 20 gallon tropical tank. It amazes me how little the folks at the pet stores can know. Don't get me wrong, some of them are truly experienced in the field, but so many of them don't really know anything about keeping fish.Jrobber said:And that is why I started looking here rather than listening to the fish store. Within a week, my silver shark had died in my 29 gallon tank, even though the worker said it would be perfectly fine in my tank.