MatO,

You are correct, according to Russo and Thurston in a 1991 study found that
KOI can sustain ammonia levels of 2.2 ppm for 96 hours before dying. Of
course, this does not mean that they won't be affected in some ways with
ammonia burns etc. and that some weaker fish may die sooner, but, for the
most part health fish can live in the environment for this short period.

Also, it should be considered that ammonia is very lethal and should be
maintained below .5ppm. Ammonia is more lethal at high pH while Nitrites
are more lethal a lower pH.

As far as I can see by the thread Tim's Ammonia is no where near lethal
levels.

Tom L.L.
"MattO" wrote in message
...

"john rutz" wrote in message
...
Timothy Tom wrote:
TEST RESULTS of Deadly Pond Water:

O.K. I tested the pond water which killed a goldfish within two hours.
Please note that this water has been sitting there for over 48 hours,
so it is not exactly the same water that killed the fish.

The pH measured at 7.7 using Tetra test kit, the nitrate measured at
perhaps 1 PPM (color between zero and the 2 PPM color on the color
scale) using Salifert test kit, the total ammonia measured at between
.25 and .5 PPM using a Tetra test kit.


-- that amount of amonia is deadly if i remember correctley

John Rutz
Z5 New Mexico


Tom,
I don't buy the ammonia theory.
0.25 -0.5 ppm ammonia is not that severe, certainly not bad enought to
kill
so quickly.
If it were no fish would ever survive a cycle, right?
Temp & pH factor into toxicity of ammonia, but extrapolating from table in
http://faq.thekrib.com/begin-cycling...w-much-ammonia
pH of 7.7, even at 83F, 0.5 ppm is not off the chart, is it?
Count me in the leaching septic or fertilizers camp
~ MattO