[Riverbait]

How many adult cariba piranhas is the maximum in a 120 gal tank. I was thinking of 3 or 4 .
Will artificial plants be destroyed by these fish? Can someone post pics of tank with articial plants (amazon swordstail etc..)
Is it ok to put a bucket of tank water from my 55 gal goldfish tank (water never changed after 4 years) into my new tank? Does this help with the cycle process?

 

[One800Jonny]

As for fake plants your in the clear. Ive only heard that p's will eat live plants. As for putting the bucket of water from your goldfish tank, that is probly the best thing you can do to quickly cycle your tank.

 

[acidWarp]

How many adult cariba piranhas is the maximum in a 120 gal tank. I was thinking of 3 or 4 .
Will artificial plants be destroyed by these fish? Can someone post pics of tank with articial plants (amazon swordstail etc..)
Is it ok to put a bucket of tank water from my 55 gal goldfish tank (water never changed after 4 years) into my new tank? Does this help with the cycle process?

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You can do more than four, I'd go with 6 to 8 max. As for the water, that will help speed it up, but you havent changed it for 4 years?!?

Is that a typo, I hope so?

 

[Riverbait]

Yes it's true. I have added water as it evaporates, but never changed it. I clean the green algae off the glass. However the water is still very clear and my gold fish are all very healthy. I don't even use a filter. I am not saying that is necessarily agood thing, but my fish are very happy. I should add that there are only four goldfish.