With the stocking, they've actually all left one another alone. There haven't been any fights or injured fish. I am already saving up to buy a bigger tank.
As for the pacu, my mom used to have piranha. Lately, since I've really been getting into fish, she's been missing them. She practically begged me to let her buy one and put it in my tank until she can get it a tank of it's own.
I wasn't too sure about it, but everything has been working out okay.
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