On Sat, 27 Oct 2007 23:17:06 GMT, Brian Whatcott
wrote:

On Sat, 27 Oct 2007 10:02:59 -0500, Peggie Hall wrote:
Urine can be alkaline or acidic...doesn't seem to matter in a metal
holding tank.
.....
I have this hunch that waste water rendered slightly high pH
of neutral would help a tank to survive

..-
Waste and water have about the same pH...7-9..

I finally bought the silver oxide cells for my Corning pH meter, and
peed a sample to check - it read 5.5 pH - about where I expect.

But...but..but: I seem to recall that waste mater can soon smell
ammoniacal, and maybe THAT'S the alkaline component?

Brian W