I set up a new tank about 3 weeks ago. Its planted with a clay based substrate, a bunch of bladder snails and a handful of ramshorn snails from another established tank. I added root tabs and liquid fertilizer for the plants so I'm detecting nitrates. Ammonia came down to zero this week. My aquarium co-op test strips are detecting high levels of Nitrite but my API test keeps coming back as zero. I used a test strip in my established tank and it showed zero nitrites. The API test showed zero nitrites in the established tank as well.
Any idea why the test strip and the API nitrite results are different?
