Neons not Schooling

i have 20 neons which school fairly well. however after the most recent tank cleaning, i rearranged some driftwood and stuff slightly, and i think they're fighting over territory. when they're settled in again i expect to see their regular behaviour.

my glofish (zebra danios) were huddled together worriedly when first introduced, but these days they mostly just chase each other around. i had 12 and then moved half to my other tank... i think i'd rather have them back in their original tank but i don't want to stress them out by having to catch them all over again and move them again!
 
At my LFS they have a 75gal with about 40-50 Cardinal Tetras alone in the tank; they shoal beautifully, I would think in a tank that large by themselves they would loosen up a little. Maybe because they're in a high traffic area where everyone walks by they school tightly.

I want to get Cardinal Tetras once my Neons die off(I know that sounds harsh, but I'd rather keep only one species), but when they school it's so beautiful.

I just added 4 more Neon Tetras to my tank today, to total 10, right now they're playing follow the leader, but once they settle in they'll probably go back to dispersing everywhere.
 
At my LFS they have a 75gal with about 40-50 Cardinal Tetras alone in the tank; they shoal beautifully, I would think in a tank that large by themselves they would loosen up a little. Maybe because they're in a high traffic area where everyone walks by they school tightly.

I want to get Cardinal Tetras once my Neons die off(I know that sounds harsh, but I'd rather keep only one species), but when they school it's so beautiful.

I just added 4 more Neon Tetras to my tank today, to total 10, right now they're playing follow the leader, but once they settle in they'll probably go back to dispersing everywhere.


In a tank that big, it's almost a necessity for the cardinals to school. It's so wide they can't see what's happening at every end of the tank. In larger tanks, they will school more frequently than in smaller tanks. This is a rule that will always apply.
 
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