Quote:
Originally Posted by fishytime
How old and what brand are your test kits?
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About 6 months at most old. I have other tanks, too, and they test differently, plus have tried it on new SW, and nitrates come out zero, so I think they are quite accurate. I use the API test kit.
One thing I learned a long time ago, is that you need to follow directions on the test kit very carefully. Specifically, you need to shake the bottles and vial for at least 30 seconds after bottle #1 and then at least 1 minute after bottle #2 and let it sit for a few minutes after. If you don't do that, you will get a false low reading. Which is what may be happening to some people who think they have low nitrates.
Walter