"Charlie Self" writes:

Larry Jaques writes:
It's strong, so be sure to neutralize afterward. Muriatic is dilute
hycrochloric acid. Use it outside. The fumes are nasty.

OK if I just leave the bathroom window open? I'm not up for hauling
the crapper outside just to get some rust off.

Take care, the fumes will make any iron that they hit rust, even if it
is stainless steel. I would not recomend it for rust removal!

But I wonder what the stuff, even neutralized, will do to my septic
tank.

Nothing, even un-neutralized. Consider the acidity of rain water, or
that if you are sick you also bring up fairly strong hydrochloric
acid. Neutralized it's nothibg else than salt water.

--
Dr. Juergen Hannappel http://lisa2.physik.uni-bonn.de/~hannappe
Phone: +49 228 73 2447 FAX ... 7869
Physikalisches Institut der Uni Bonn Nussallee 12, D-53115 Bonn, Germany
CERN: Phone: +412276 76461 Fax: ..77930 Bat. 892-R-A13 CH-1211 Geneve 23