http://www.westmarine.com/webapp/wcs/stores/servlet/SiteSearch?storeId=11151&langId=-1&catalogId=10001&pageSize=10&beginIndex=0&sType=SimpleSearch&searchTermScope=3&Ns=Most+Popular%7C0&keyword=diesel+fuel+treatments&searchBtn=
Try this link. It is for diesel fuel treatment for boats. From the West Marine catalogue. They sell several different varieties.
Good luck
Biggastractor
The biggest problem with algecide diesel treatments is that you then have a big blob of dead alge to deal with.
I use a product called "Howe's Diesel Treat" in my boat and have no problems with critters in my fuel. It also improves lubricity, and reduces gelling. It is intended for the heavy truck market. My 6-71TIs love it.
Good luck,
Rick