As of right now I have 3 3-4" barred midas in a 75 with what is now a breeding pair of motas, which are only 2.5"-3" themselves. I was wondering what would be the minimum size tank I will need in the future to have inhabitants with my motas, such asone of the midas and maybe some other large specimens. I plan on upgrading next semester once I'm living in a house. Thanks.