Problem with my tank

[Byron]

Oh, I see. By the way I'll change the water today, so I cut some of the grass, so they have more space to swim in the open, and so far the Rummy nose stopped chasing the other fish.
I will also buy 2 male barbs, because now I have only females.
If things get like they were before I won't do any changes until we move them in the other tank.

And sorry for spaming the threat, but every day something new comes out

You had seven rummynose, one is now apparently dying, so that leaves six. With this species you should aim for no fewer than 12, and more wold be best if you have the tank size they need which is minimum 3-foot length for 12.

You said you have 2 cherry barbs. This species needs 10 or more. A group of four is not fair to the fish.

 

[Tiara]

You had seven rummynose, one is now apparently dying, so that leaves six. With this species you should aim for no fewer than 12, and more wold be best if you have the tank size they need which is minimum 3-foot length for 12.

You said you have 2 cherry barbs. This species needs 10 or more. A group of four is not fair to the fish.

No, no RN is dying. Also the new tank will be longer so I think I may put 2-3 RN more then.
My male Pentazona barbs died (both of them). Today I bought 4 more - 2 female and 2 male, so now they are 7 in total (will add at least 3 more in the new tank).
Now I only have 1 female Cherry barb, which is doing very well by herself. She is swimming with the RN. I will give her away if she becomes stressed.

Both Cherry barbs were given to me as a gift and they were doing fine, but I know that they need a group.

 

[Byron]

No, no RN is dying. Also the new tank will be longer so I think I may put 2-3 RN more then.
My male Pentazona barbs died (both of them). Today I bought 4 more - 2 female and 2 male, so now they are 7 in total (will add at least 3 more in the new tank).
Now I only have 1 female Cherry barb, which is doing very well by herself. She is swimming with the RN. I will give her away if she becomes stressed.

Both Cherry barbs were given to me as a gift and they were doing fine, but I know that they need a group.

OK. You won't really see stress until the fish succumbs to something which it would/should have been able to fight off under normal conditions, and dies. I wold leave the lone cherry barb, you have it and unless you want a full group, allow it to live out whatever time it has left. But if it does become aggressive, as sometimes happens when the fish is the last of, or in in suifficient numbers, the group, and has to be euthanized to save the other fish.

The rummynose need 12 minimum, regardless of tank size, if you want them to be well-adjusted. Pentazona are OK as described.

 

[Tiara]

OK. You won't really see stress until the fish succumbs to something which it would/should have been able to fight off under normal conditions, and dies. I wold leave the lone cherry barb, you have it and unless you want a full group, allow it to live out whatever time it has left. But if it does become aggressive, as sometimes happens when the fish is the last of, or in in suifficient numbers, the group, and has to be euthanized to save the other fish.

The rummynose need 12 minimum, regardless of tank size, if you want them to be well-adjusted. Pentazona are OK as described.

Good, will do it! Thank you very much for your input