Sounds to me like the Ammonia is your Enemy.
I would do a Big water change! Be sure you have
plenty of DeChlor on hand. Is your water treated\
with chloramine???

Nedra
http://www.geocities.com/Heartland/Pines/4836
http://community.webshots.com/user/nedra118
"Timothy Tom" wrote in message
om...
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.