sting rays and red belly pirnah

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Nothing will ever live with piranhas for a long term. Even pleco's will have it's days marked.
 
This is worse than the idea of blowing up the moon.
 
I think it would be possible, but not in any home aquaria. Even a 1000 gallon tank would be too small.

Bogwoodbruce;2035395; said:
Why would you want to mix them in the first place!

Probably the same reason you have a variety of fish in that pond thingy of yours, I would imagine. Single species tanks a boring for the most part.
 
How about you just keep the 300g for your piranhas, they will love it. Rays will eventually need bigger than that even without the piranhas added in..
 
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