To remove water prevent fuel filter icing, Diesel 911 (red bottle) calls for 3.2 oz per 10 gallons. To reliquefy gelled fuel, it calls for 8 oz per 10 gallons. If you're using biodiesel up to a 20% blend, double those amounts. In a gelled filter, it calls for 1/2 911 and 1/2 diesel in the filter bowl. Lots easier to keep a couple spare $5 fuel filters handy.
Got some water in my fuel during the blizzard a couple of weeks ago. Stopped me dead in my tracks. Emptied the fuel filter bowl, it had some water in it. Replaced the fuel filter element, and also removed the inlet line to the filter. As I suspected, it also had some water in it. Drained about a pint or so from the line, put it all back together, bled the air at the injector pump, and it fired up. Got some red bottle Diesel 911 and dosed the fuel with 6 oz of that in my full 11 gallon tank, and also put in some Stanadyne blue. I had been using Power Service white bottle regularly, but it didn't prevent that water problem. I think part of that issue was that I had summer diesel in it, and only a half-tank, and perhaps some condensation occurred inside that black plastic tank.
It's been running perfect since, and we've had some -18 air/-40 wind chill nights where I ran the tractor to move snow. Sure glad I switched to synthetic oil on the last oil change.
Any of the suggestions from replies to your post of about a year ago with a similar issue able to help?