Algae needs sunlight,Fungus grows in the dark fuel tanks.A gallon of gasoline to 20 gals diesel will keep fungus away.

 

when i nuke fungi in my tank, first thing i do is make sure the tank is 100% FULL. so the bug killer can get into every corner nook and cranny. then let it set overnite or more.

then pack a bag of filters. at one point in my MBZ i couldnt go 50 miles w/out swapping the inline screen.

 

This happens every so often to some of the guys running vegistroke units, on the diesel side, mostly because they're using so little diesel over several thousand miles that it sits and sits and sits, and algae grows. Tell him to make sure he stays on top of his water draining intervals. I've never heard of this happening on someone who runs 100% diesel all the time, and uses it often. Does the truck sit a lot or something?

 

well that was almost 3 years ago now. hasn't had an issue since. he filled up at the only station around that night it happened and I believe they are not very busy.