Years ago, when I started my first tank, I did daily tests on Ammonia, nitrite and nitrate during start up. I graphed the results and you do get a very distinct spike of Amm and nitrite during the cycle. IME, the nitrite spike was very short lived (like, 1 or 2 days).
That was followed by a rise in nitrate, which was more stable.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
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