Re: [at-l] hiking

["KC" <felton@bluenet.net>]

> The First Need filter used to come with a small container of blue food
> coloring. To test the filter, put a couple of drops of food coloring in
> a bowl of water.  Then pump.  If the water comes out clear the filter is
> okay, if it comes out blue, then the filter is not doing its job.  It is
> a good idea to test your filter every so often, as otherwise it can be
> broken and you won't know it until you get sick.  Food dye is cheap, and
> available in the grocery. 
> Ginny

Are you saying that this works for all filters including Iodine,,,or just
works for the First Need filters? Sounds like an excellent way of checking.
KC


> 
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