Firstdiesel,

I'm not sure U have to clean the tank. I had a fungus (its fungus, not algae)contaminated fuel system. I used Biocor to kill the fungus and I cleaned the tank strainer with an air gun because I couldn't find a solvent that would dissolve the fungus. I was lucky, my strainer came out easily. In over 10,000 miles after the Biocor treatment, I had to replace only one in-line filter which I figured was plugged by the dead fungus.

For the strainer, work on it as best you can. Try vise grips and or heat, if you melt it you will just have to get another.