If the fishless cycle is to prevent the fishe from being permanently damaged, then my question is, when we go out to buy fish from the pet store, how do we know if THEY fishless cycled their tank so that THEIR fish are not sick? Furthermore, how do we/they know if their supplier fishless cycled their tank? In other words, my concern is, how do we know the background of the fish we buy to put in our healthy fishless cycled tanks?