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*3Hello
If you're talking about (Carino)Tetraodon travancoricus, not a single PP or it will turn stressed-out ! It needs to be 4 in your tank.
4 is feasable IF here I emphasize IF there will be tons of plants and hiding places. They will do better.
It is a gregarious fish. Alone it will let itself waste away. You could read this article :I'm talking about C. travancoricus species I know there's a few, I thought that you cant keep more than one unless you have ten gallons at least that's what most of my research says. I've found multiple sources that say a pair in a 10 or a single in a 5 gallon.
No, Seriously Fish says "could" that is differentI know Seriously Fish, which seems to be one of the go-to's around here, says you can do one in a smaller tank
i don't, but i know enough about them to recognize that their main strategy of survival in the wild is shoaling - you can't deny them that in captivity and expect them to be happyI've talked to a couple people that have success with just one. Not saying it's right or wrong, but I know Seriously Fish, which seems to be one of the go-to's around here, says you can do one in a smaller tank or a group in a heavily planted/scaped larger tank.
There's some here that do or have kept them that could better speak on their care. @Circus comes to mind.
*EDIT: I think @realzalio keeps them too.
No, Seriously Fish says "could" that is different
You tricked me with your profile pic!i don't, but i know enough about them to recognize that their main strategy of survival in the wild is shoaling - you can't deny them that in captivity and expect them to be happy