Nitrites too high...

H20hot

New Fish
Sep 18, 2007
4
0
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#1
The nitrites in our tank read about 3.0 ppm, which according to the test strip, is "stress level" to the fish. I added AmQuel+plus, but 24 hours later it still read at 3.0 ppm.
Any suggestions to lowering the nitrites? Everything else reads normal (nitrate=20 ppm, total hardness=soft, total chlorine=0 ppm, total alkalinity=ideal [180 ppm] and pH=neutral [7.2])
We did a 25% water change and the nitrites stayed in the stress level.
Any suggestions are appreciated *SUNSMILE*