Fuel contamination? Any idea

I've had suger in my tank before! All it does is load up fuel filters,that's it! Only reason I noticed it was I use clear fuel filters & wondred WTF was this clear sand looking crap in my filter. Had new tank,lines & sending unit. So I cut open the filter & tasted it suger. Not sure what that is most on road diesel has a green tint to it. Off road diesel is red.