I have 10 BABY black piranha in a 55 gallon tank. They seem to be getting along fine and not fighting. What size tank should I look to upgrade to in the future so they can all live peacefully as community fish? I have 5 tetra that get along just fine with them... I did my research too...
BLACK PIRANHA
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what research every site you get on says black piranha's will not live together..and my cousin bought 13 baby red bellys he is down to 8. there is no such thing as a peaceful piranha.. im just telling you and everyone will agree a black piranha is a 1 fish per tank or if your luck 1 pair per tank species. if you can find the research that says you can house more than 2 together post it we would like to see it.. and if you can post pics of the BP's..if they are peaceful you might have pacu. trust me if been there done that learned from it and wont make that mistake agin..
You'll find many answers that are just opinions. Keep live food with your p's first of all. I catch as many small fish I can with a minnow seine. Quarantine them for about 10 days with medicine(parasitical) . Just make sure the food will not be eyeing your fish as food. No bass, catfish etc. You will definitely need a much larger tank eventually. Like when your fish are 3" or so. How large? I started with 8 baby rbp;s. kept them in a 100 gal till they got about 4" or so. Transferred them to their permanent home of 249 gal tank. Only lost one. It was Fred- he thought this rats tail(full-grown) was a worm. Poor Fred started choking on the tail. By then, the other 7 finished off the rat. Just a alittle of the shoulder blade and hip bone left. The other 7 went to go check on Fred. Fred was then starting to tilt to his side. P's being P's, decided Fred was on his way to P heaven- so they helped him on his way! Yes, I was heart-broken.
i sarted with 9 red bellys and i still have all nine.. i bought them in march and they are about 4-5 inches long..
Reds are not RHOM's and if that is what u have in time u will end up with just one they will not tolerate tank mates but their your fish and you did the research. Now would anyone like to take bets on lifespan of 10 RHOMS one 55gal please i could use the cash1
Yes. They are far more aggressive and are solitary fish. They can only be housed together in Amazon-sized aquariums. 
If and when you are housing black piranha together, they will destroy one another in a few short weeks (if that long).
Have you noticed if they have begun to nip each other's fins? If not, chances are you are keeping pacus.
If you can provide us some images, we can assist you in correct identification of your "black piranha".
If and when you are housing black piranha together, they will destroy one another in a few short weeks (if that long).
Have you noticed if they have begun to nip each other's fins? If not, chances are you are keeping pacus.
If you can provide us some images, we can assist you in correct identification of your "black piranha".
Update here is photo my 13incher in 5x2x2 140gal , fish will accept no tankmates especially another piranha unless fish is very small and fast , even then they all usually get picked off, as an experiment i once introduced 40 red eye tetra(as past experience was good with r bellies) all were eventually picked off! the only fish that have survived to date are flying foxes, these little algae eaters are superb at not getting eaten and have been in tanks with both my blacks. Have kept blacks for three years now and am open 2 any questions or comments!
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