Last Stage Of Cycle

If the readings are both zero tomorrow, the cycle has finished. If you can't go fish shopping straight away keep adding the 1ppm dose every two or three days. As soon as you can go fish shopping, do a big water change (90%-ish). The same morning or the day before the shopping trip is the time to do it.

If one or both are not zero tomorrow, it depends on what the readings are.
If ammonia is below 0.2 and nitrite is below 1.0, repeat steps 10 to 12. That is, add 3ppm and test after 24 hours.
If the nitrite reading is above 1.0, add a 1ppm dose and test again in 2 days (as per step 9)