but i suppose i cant have all 3 in a tank my size with some bottom feeders and and a school of tetras
No! You can't!
We all have to reconcile the things we
want to keep with the things we
can keep. If you want a big cichlid or two, then have a big cichlid or two, but don't expect to be able to keep catfish and tetras as well; that's a separate tank!
I have to disagree, Severums, Chocolates and Acara types are all fish that can cohabit with bottom dwelling tank mates such as Hoplos, Flagtail Cats, Pims, Brochis, various loches such as YoYos perhaps and of course a variety of plecos (though I would stay away from commons and the larger ones as it will take a large proportion of a 90g) I have whiptail catfish in with my Severums, Geophagus and Nicaraguan
Since Chocolate Cichlids are primarily surface feeders waiting for bugs to land on the water, if you watch them they always tilt slightly up
And Severums are quite vegetarian I would think larger tetras would be fine and if in dobut get Bleeding Hearts as they are just the fastest tetra around
Just dont get torpedo shaped tetras like Rummynose or Cardinals etc. A variety of other South American fish would also work, headstanders are always a nice addition to this size tank such as spotted headstanders, maybe marbled but they can be a bit nippy.
If anything in South American Cichlid tank and often in Central American tanks schooling fish are somewhat essential (in Central American tanks livebearers are often used) as they act as whats called "Dither fish" which are smaller fish that stay up higher in the water which tells the larger fish (though not large enough to properly be predator to them) that the water is safe and in many cases with these kind of cichlids the lack of these fish cause stress to the larger ones and cause them to hide. The catfish are an inevitability in any waters and as such fish just tend to ignore them.
Though Chocolates are pretty large they are as gentile as anything, I said a Rotkiel as they stay generally smaller than common Greens and Golds again to lighten the bio load (compensating for the big choc) and an Acara type would finish off a nice trio. Or you could do the Choc and a group of the Guianacara or Cupids that I mentioned or you could do the Rotkiel with a group of them and maybe one other medium sized cichlids?
Hope thats helped
Wills