Turtles are very independent creatures and will usually not interact with one another, unless in courtship. If there is more then one turtle in the same tank, they should be monitored to make sure that they are compatible. Although they may not interact with one another, there still sharing the same tank with one another. If one, both or all the turtles start to have respiratory issues; labored breathing, runny nose or discharge from their eyes, nose or mouth, they are not compatible with one another. This rarely happens, but in the case that it does, one or all should be removed from the tank and put in separate tanks.