it's unlikely and if you want to keep it that way, you will need to qt every single fish, including your first one(s). if you don't plan to do tank transfer and/or medications to ensure you have no disease, your fish should stay in qt for AT LEAST a couple of months. i know it's frustrating but better safe than sorry. IF you get fish that are diseased, dealing with them in qt/hospital tank is much easier than dealing with it in your dt!