Thread: High nitrites
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Old 01/23/2020, 11:41 PM   #20
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Join Date: Mar 2002
Location: Mountain View, CA, USA
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Nitrite will confuse most or all nitrate test kits, so I wouldn't worry about that measurement just yet. I am not sure whether that test result is correct, but if it is, I might do a series of 30% water changes to lower the nitrite level a bit. High nitrite levels might inhibit the growth of beneficial bacteria, but I am not sure on that. I wouldn't put a lot of effort into it, since the tank will be fine given some time. I might try testing some distilled or freshly-mixed saltwater, to see whether the nitrite kit is doing its job properly.

The bacteria that process ammonia in our tanks live on the substrate. I don't see any evidence that a skimmer will cause a problem in a tank, or affect the ammonia cycle much. Lots of people have run skimmers off and on and not had much of an issue, although it's hard to be sure what's happening.

Jonathan Bertoni
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