"Biobor" is a well known and readily available biocide that is used to combat the growth, any new product will only be a competitor to an already established market leader.
Indeed so.
The first jet airplane (business jet, anyway) to have these difficulties was the Lockheed JetStar, but fuel additives solved the problems.
I think the original posters friend has a solution looking for a problem...that has been solved already.
IE: a financial dead-end.