Hi

I am somewhat of a newbie to garden ponds, although have kept aquariums
in the past. I live on the Isle of Wight, so no big fluctuations in
temp. I have a pre-formed 60 gal pond, planted with oxygenators, water
lettice, and marginals. I have an internal pump feeding a UV Fishmate
filter that runs onto a waterfall. The pond in several weeks old now
and was filled with water from the stream behind my house. Inhabiting
my pond are 4 very small common goldfish. My query is that although
tests for ammonia, pH, and O2 are all good I have a constantly high
Nitrite level. I have tried 1/2 water changes and added Zeolite to the
filter system. It is my understanding that ammonia oxidises to nitrate
and then nitrite......so how come there is no ammonia but levels of
nitrite are at 0.5ppm?

All help greatfully recieved, julie
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juliepacker
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