Now that is practical information!
I only use my water tank for washing, not drinking.  But if people find that a Coke Soaker cleans things up, I'll try it.
Jeff

> Date: Tue, 17 May 2011 09:22:52 -0700
> From: starwagen@GMAIL.COM
> Subject: Re: Water tank
> To: vanagon@GERRY.VANAGON.COM
> 
> On Tue, May 17, 2011 at 8:56 AM, Rocket J Squirrel <
> camping.elliott@gmail.com> wrote:
> 
> >
> > I usually drink the water in the tank without a thought. It seldom
> > tastes off unless the water I put in tastes off. When not in use, I
> > leave the cap off the bottom to promote air circulation and drying. I
> > suppose a mouse with exceptional leaping powers and good aim could
> > launch himself in there, but I'm not expecting to find such a physical
> > specimen hereabouts.
> >
> 
> I used to do the same. Until, when cleaning out one Spring before initial
> filling, I found the spiders....