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Is my tank cycled?

Q: How do I know if my fish tank is cycled?

Your test kit reads 0 ammonia and 0 nitrite, with some nitrate, on two tests in a row. For a fishless cycle, the tests are taken 24 hours after dosing 2 ppm of ammonia.

Q: What ammonia level is dangerous for fish?

At 0.25 ppm of ammonia or nitrite, change 30 to 50 percent of the water and feed less. At 1 ppm or more, change water right away.

Get a check like this every day, with reminders, in the TankCoach app.

How do I know if my fish tank is cycled?

0 ammonia and 0 nitrite, with some nitrate, on two tests in a row. For a fishless cycle, test 24 hours after dosing 2 ppm of ammonia.

What ammonia level is dangerous for fish?

At 0.25 ppm of ammonia or nitrite, change 30–50% of the water and feed less. At 1 ppm or more, change water right away. Ammonia, explained.

How long until my tank is cycled?

Usually 4 to 8 weeks. The cycle timeline estimates your finish date.