Bill,

I go to the RV store and buy the blue stuff they use for the RV toilets.
It does a very good job. You have to experiment a little to get the
dosage right but it works pretty well and is biodegradable.

s,

zip

Bill Tuthill wrote:
Maybe I should ask this on Boatertalk's rafting section,
but here goes.

Are any products useful to reduce portapotty odor?

I know of powdered Clorox (causes pressure build-up)
Blue Goo (never tried it, but some rafters swear by it)
and now Odorlos/Odørløs, a dry powder.