Surf,

Sounds like U have a fungus (its not algae) problem. Only way to cure it is to put a fungacide in the fuel tank. If U don't cure the problem the fungus will plug your filters and tank screen. Biobor is the main fungacide manufacturer but diluted products might be found at marinas or tractor (farm equipment) dealers. I tried truck stops but couldn't find any fungacide available.

U don't have to remove the fuel tank. The fungacide will kill the fungus but it may plug a few filters until it is out of your fuel system. Just replace the filters when they plug up, no sense replacing then sooner. U might have to take out the tank strainer and clean it.

P E H