Bacon Bomb- Fuel Sampler by Fueltec Systems

Take fuel samples often to prevent unexpected engine shut down; if contamination is found...POLISH YOUR FUEL
Water... being heavier than fuel is found under the fuel at the tank bottom.
Condensation… will be pulled by gravity to the tank bottom.
Bacteria & Fungi… are heavier than fuel but lighter than water and will be found at the fuel/water interface as shown in the photo.
Rust… is heavier than water and fuel and will be found at the tank bottom.
As much as 90% of the upper fuel in a storage tank may not be contaminated if left undisturbed.