> From: "Jeff Bodin" <bodin1 at gte_net> > Subject: pH Shock... > > The way it was explained to me was it wasn't the swing that killed the fish, > but any NO2 at a low pH is very toxic as nitric acid (as I think Paul is > trying to say below with the chemical-ese). _nitrous_ acid. > > I think that NO2- is pretty toxic but that > > HNO2 is a good deal worse, -- Paul Sears Ottawa, Canada