At the risk of taking this somewhat off-topic thread even further off,
consider how much clorox bleach we dump into our septic systems each
week doing laundry... I can remember back in my beer brewing days
that it only took a few drops of clorox to kill all the bacteria in a
10 gallon fermenting carboy. I'm no chemist, and except for the issues
with copper as mentioned by other posters, I don't think a few ounces
of FeCl3 now and then compare with the rest of the daily crap we
polute our septic systems with.
Just my nickle's worth,
Jim
--- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:
>
>
> "Leon" <leon355@...> writes:
> > The odd pint or so a couple of times a year won't have any
> > noticeable effect on the environment.
>
> Caveat: an odd pint in a septic tank may kill off enough bacteria to
> mess up the tank's biodegration properties. I'd rather dilute it and
> pour it somewhere where I ∗want∗ to kill off some growth, than pour
it
> into something I want to keep alive.
>