Molds are everywhere and home buyers are often concerned about elevated levels of mold growth in any home they are looking to buy. Mold spores are not visible to the eye and can not be seen if they are floating around in the air. However if there has been some mold growth going on for awhile here is a tip tip on how to make it more visible to the naked eye. All you need is a flashlight.
Use your flashing light and run it along the surface you are looking at such as a wall or floor joist in the basement. Shining the light this way will help make any fuzziness stand out.
Here is a video showing how to do it. This was recorded at a Historical in Kenton Ohio.