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Hello,
My 29 gallon tank has 8 cardinal tetras, 6 rummynose tetras, and 2 otos. The problem is all of them like to hang out mid/bottom and the top is completely empty. I got a swordtail after being told it was a peaceful fish, only to see it chase the otos around with evil intent.

So my question is, what are some recommendations for bigger sized fish that will occupy the top of my tank while leaving my tetras alone?
 

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You could do a gourami, they mainly stay near the top. Considering your tank is only a 29 I'd go with one of the dwarf species. Some like the neon blue and powder blue have pretty striking colors. They tend to be pretty peaceful but they all have different personalities so I can't say for certain. Others will probably chime in. Good luck hunting!
 

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I second the hatchet fish.
 

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I had the same problem, but fixed it with some harlequin rasboras. They love the top and middle, but rarely go to the bottom.
I too am a fan of the harlequins. Although I dont know if I could say mine stick to the top and middle. I guess they are hardly near the bottom of the tank so you're probably correct.
 
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