I have 250 gallons of good bio in a tote and was wondering if algae can be a problem with bio and if so, should I go ahead and add a bottle of algaecide to the bio? Anyone experienced with this? Thanks!

In my experience, bio has more of a problem with algae. If the tote is being stored where it will see temp swings you are going to get some condensation and once you have a water/fuel interface you are just waiting to get an algae problem.
You probably want to add some if you plan on using it over a long period of time.

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1987 300SDL-268k mi

thanks!

Putting a desiccant breather on the tote will help keep the moisture level down. Preventing temperature swings will help a lot also. I treat my barrels with Startron Tank cleaner, Diesel Kleen, and some Stabil. Probably overkill, but I have not had an issue with my fuel yet. My longest storage time has only been about 4-5 months though.

-Jim

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1995 S350D, Green with black leather interior.
Bought January 2008 w/ 233,xxx miles.
I did 22,000 miles during the first year of ownership.

great advice, thanks!