Marine 16's Diesel Bug Test Kit is used to check for microbial contamination of diesel fuels in boats, storage tanks, home heating fuels, etc. The test kit uses the 'dip slide' method of detection by taking a suitable sample of water/diesel from the bottom of the tank. This sample is smeared on the slide, which is then inserted into the tube where the culture will grow and micro-organisms are shown as a culture.
The pack comes with a handy step by step guide that includes images. One test per kit.