Today at work, We got in a couple red devils that were 3 inches, so put them with the dovii's it didn't work, than we put them with the convicts didn't work, last we kept them in a 20 gallon, just for a tonight.So I was wondering do you think the devil's would do fine in a 75 gallon with jag's that are almost the same size?? Thanks..

You can try however red devils are mean fish. I have never kept them so i can only go on what i have heard and that is that they will batter the jags. But all fish are different so you never know. Give it a shot and see what happens. Have a tank ready for them just incase