funola,

You are complaining about $18? I bought a quart of Biobor and it was almost $80. About half was shipping because its considered a hazardous substance.

I looked all over and couldn't find a fungicide except mail order from the distributor. Of course after I bought it I found some at my local New Holland Tractor dealer.

Yes, its fungus not algae. Algae won't grow in the dark and its green. You have to use a fungacide to get kill all the fungus in your fuel system. It will regrow from the fungus in the fuel lines, filters, IP, ETC you didn't get b y just cleaning the fuel tank.

P E H