Ryan,
If you have adequate filtration or if the tank is a heavily planted tank, the bioload should not be a problem. Given the size of these fishes, 50 in a 2 ft tank is still managable. But there won't be much space for anything else.
Also, do take note that when you first introduce the fish, you have to manage the nitrate/nitrite in the water if your tank is fairly new. Otherwise, casualties will be high.
Cheers,
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