The home mold test kit was one that I picked up at a hardware store. Set out the petri dishes for so long and then bag it up and send it in. The problem is that not all molds will grow on the medium. You need to find a company that does “indoor air quality” testing. With the petri dish method – I had no mold. This set me back about six months. When I did the “indoor air quality” test with professionals my numbers were very high. Doggiemama – there has to be someone in your area who is certified to do this test for you. But, it is expensive. Well worth it. They use an air compressor or something like it to suck the air into a small bottle. They do the basement, outside and living area. Then, I believe it is a manual analysis.