On Tue, 28 Dec 2004 03:47:20 GMT, wrote:

ammonia drives the pH up, but the lower the pH the safer the ammonia.
nitrites drive the pH down. salt helps prevent nitrite toxicity.
if either is really high a big water change will remove enough that shifts in pH are
going to be more than offset by the benefits of lower toxins. INgrid

Perhaps, but in a pH crash, the filter quits working and the ammonia is
non-toxic in the lower pH. If the water is changed with a higher pH,
without treating the ammonia it turns it toxic. A large water can be very
stressful. IMO, better to treat the ammonia, do a 20% change, check
buffering adding baking soda if needed and add salt if nitrites are
present.

Prior to ALL that. Check all parameters and report, weigh all options
expressed on usenet. ;o) ~ jan


~Power to the Porg, Flow On!~