Art- If I read your post right, you had water in the gasoline noticed in three filter changes. Then you added the additive and subsequent filter changes you noticed no water.
So could it be that the filters actually caught the water, and no water remained available in the tanks to be grabbed by the pickups?
I'm not sure the lack of water in the filters can be attributed to the additive. Changing and draining filters is a known proven method to eliminating water.
Also, if you are using gasoline with ethanol from the pump, that is an emulsifier and will tend to suspend water.
Nothing you posted proves the additive solved your problem. Just changing filters and using the fuel will give you the results you described.
Also, to minimize confusion, chemistry for gasoline and diesel fuel are different and an additive for one may not be appropriate for the other. I think an emulsifier is more appropriate for gasoline than diesel.
Most readers here run diesel, and an emulsifier is not a good idea.