Why Are My New Cardinals Not Swimming/schooling?

Dechi

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I got 14 cardinal tetras about a week ago. I might have lost 2-3, I don’t know they’re very hard to count, plus I have 5 neon tetras that swim among them or close by, making it even harder.

I thought cardinal tetras liked to swim around the aquarium a lot, in schools. But mine seem to mainly stay in one spot (top left, as you can see in the video), or spread in different places.

Are they still shy ? Do I have too many plants (I trimmed them to give them more space, but they grow fast)? Is it the other fish ? Too much water agitation ?

I just would like them to be happy in their environment, but I don’t know what to change to please them.

Here’s a video so you can see how they behave :

Thanks
 

Rdrb

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Sometimes they say the non schooling behaviour is actually good meaning the fish are getting used to their surrounding and they school wen they feel spooked however i think you should give it more time to get used to the surroundings
 

kallililly1973

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Agree with above when they feel comfortable they will break away from their tight grouping.. see how they react when you do a WC I’m sure they will all find each other... safety in numbers
 

DoubleDutch

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Seems to be the darkest spot.
If you watch this vid, you know why.

Whrn they feel more at ease in their new surroundings they'll move around more.

 
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Dechi

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i think you should give it more time to get used to the surroundings
I will before trying anything. A good 4 weeks.

see how they react when you do a WC I’m sure they will all find each other..
Good tip, WC to do on Sunday, so I’ll pay attention.

Seems to be the darkest spot.
Hum, I hope they can get used to the light because it’s needed for the plants.

But you’re right, this is probably the darkest spot.

They’re eating well, so I guess they must be at least okay !
 
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