I don't know yet, because currently I only own gachua in its own tank. I don't have any other snakehead yet, just asking questions in general. I'd happily get any tank, any size, that you'd recommend though.Impossible to answer with telling us what size tank you’re talking about?
Thank you, and by marus. Did you mean marulioides or marulius?Channa Barca is the most peaceful I know, some even keep them with smaller fish. But good luck getting. And they are not for Beginners.
Some keep marus with other large hardy fish like pred cats or gars. But you need a calm individual for that. If you have I don't think the other fish species isn't as important as long as it is hardy enough, calm and doesn't look like a channa.
I also saw some african community tanks with obscura and some keeping pleurophthalma with other large fish, however they can be real jerks and prefer black water.
Don't worry, in my place. I found them in almost every fish shop nearby.Marulioides, I am sorry, I always forget marulius exists, but from what I read they are also among the more peacuful channa, but harder to obtain.