Do i need to quarantine or is this normal?

[Squiffy]

10 gallon tank, Tetra 20i filter, ammonia:0
Nitrite:0
Nitrate:20
Tank mates: 4 other danios, 4 ghost shrimp, 2 mystery snails, and a handful of fry (either platy or danio, the jury is still out on that one)
Tank age: 3 months

I have no idea how to upload a video or a gif. Here is a link to a gif of my danio. Http://makeagif.com/i/wS_L53

I hope that works. He had been doing this all day, only stops to eat. If the link doesn't work, my danio is sitting by the bubbler kind of twitching/making sporadic movements. The rest of the aquarium is healthy. This just started today.

Any advice will be appreciated. Thank you!

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[Squiffy]

Update: turned the lights off and now he's schooling with the rest of the danios. Could the light be bothering him?

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[Noviceafter2yea]

Turning the lights can be very helpful when a fish is stressed. It is also good to keep the lights off for a little while after a big water change and after medicating.

Could also be needing more oxygen if it is by the bubbler. Turning off the lights may have slightly increased the oxygen?

 

[Squiffy]

I quarantined him because he started doing that while the lights were off. I'd rather be on the safe side.

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[Noviceafter2yea]

Always better safe than sorry.