There have been plenty of threads that go along the lines of "Help!!! Clogged fuel filters" and "Algae infested tank!!!" Plenty of solutions for the aftermath, however, I want to avoid having to make my own personal help thread on the front side while my tank is nice and clean,(so I hope) I want to know how to avoid this situation. I rather not simply have to throw some chemicals in every tank full. I'm away at school so the car sits most of the time but gets a nice drive every month or so; still not enough to burn any significant amount of fuel over time to require refueling. Should I keep the tank full, empty or does it even matter and what are your suggestions to preventing this preventable problem?