Those fish live on their own. Jack is in a 30. Hes doesn't eat if hes in a larger tank. Mango is not a friendly fish. he attacked the other 2 Red Devils I got him with & as u can tell, they didn't make it.

When Jack was ill, I had to give him my 7 inch Goldfish. Jack isn't fish friendly & he really needed a fish that would last long with him, to regain his strength. Jack was found dry on the floor & Rob brought him back to life, but he was not normal. By chasing the goldfish around, he was able to swim properly again & was able to eat food.

Then I gave Mango the Goldfish & well. the goldfish lasted a whole 30 seconds, it died instantly.


EDIT: Mango is in a 55g