Richard, you wrote:

<<I have found on my boat's heads that house hold bleach is far better
than the
commercial products offered for holding tanks and porta
potties...absolutely no
order, start with a cup in water in the tank , and a couple ounces each
day...try
it ... works well and its cheap >>

   Chlorine bleach and other household chemicals may be incompatible with
the
seal(s) on the slide valve...don't want to lose those!  For that reason,
I mistrust
any homebrew odor control.

        George
        '89 Westy, Wernher

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]