Hmnm I did a test when I lost my first angel. 3 days after I receive it. And nitrate was zero. Remember I had to replace at least 50% water with fresh one. In my first week I did a mistake. I puted nutrafin cycle like if it was new and if it was a 50gallon tank. Previous owner told me it was a 55gallon.
. I don't know if it could afect the nitrate in the cycling process?
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