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only nitrate left


clowe18

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I have have nitrate left in my tank, 10ppm. ammonia and nitrite levels are zero. through my research i read that nitrate leave the tank when it bubbles and turns into a gas. when will i be able to add fish?

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Give it a week after the nitrates reach 0 and you do your first water change before adding your first fish to ensure the cycle period is over.

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Don't worry much about nitrates below 25 ppm, which are safe levels for fish. Nitrate doesn't leave the tank directly, it must be used by organisms (like algae or bacteria).

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