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Well, it took my tank about 4 weeks to cycle completely. Once the ammonia and nitrites were down to zero, I did a 90% water change to bring down the nitrates. However, after using my API kit, I can't really tell if the nitrates are low enough. The results were a bright red color. The closest color to that is 40ppm.
Should I do another large water change to try bringing it down lower than that?
Should I do another large water change to try bringing it down lower than that?