Is my tank cycling? Water chem not changing.

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Spaullba

Aquarium Advice Apprentice
Joined
Dec 31, 2016
Messages
27
It has been up and running for 1.5 weeks now. I am doing a fish-in cycle with 3 Zebra Danios that have been in for 4 days now (first week no fish were in).

I have tested the water every day they have been in and am not getting any change in ammonia at all. It has been completely constant at 0 along with my nitrites. My nitrate MAY have gone up very little, maybe from 10ppm to 20ppm. But it is hard to tell.

I am wondering if it is normal for there to be so little change in water chemistry?

I changed about 10% of the water yesterday and that was the first change I have done.

Also, as an aside, would it be okay t add two or tree more danios within a week of adding the first 3? Especially since the levels have been so constant?
 
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