Zebra Danios

Walter Kirby

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Hi, I’m new to Fishlore and semi new to the aquarium process. I have had aquariums in the past, but all failed due to me not following the nitrogen cycle. However, before I bought a new tank a week ago, I looked into all the details about adding ammonia and waiting until ammonia and nitrites are at 0, while nitrates are up and doing a water change. Since my cycle is not done, I will not be adding fish. However, my tank is a 30 gallon long tank, clearly without any fish. I was wondering, when my cycle completes, can I add 8 zebra danios at once? I know they are hardy fish, so even after my cycle is complete, I want them to be my first fish in case of any mistakes. I also know they are a schooling fish that are better in larger numbers. Therefore, I wanted to know if adding all 8 at once is okay because they are relatively small, so I thought adding 8 of them would be the equivalent to adding 3/4 of other fish, i.e., platties. Thank you all so much.
 

mattgirl

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Yes you can. By dosing the tank up to 5 ppm you should have a large colony of bacteria. As you are getting closer to the completion of your cycle you could actually start dosing it up to a lower level and you should still not have a problem adding all 8 at the same time. I would think 2 or 3 ppm would be enough.
 

Cander

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mattgirl said:
Yes you can. By dosing the tank up to 5 ppm you should have a large colony of bacteria. As you are getting closer to the completion of your cycle you could actually start dosing it up to a lower level and you should still not have a problem adding all 8 at the same time. I would think 2 or 3 ppm would be enough.
Along with what mattgirl said if your tank starts to take a long time to cycle lower the amount of ammonia I’ve seen people who have added to much and it slowed down the cycle
 
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