Welcome to TFF.
We always ask for source water parameters before considering fish; I can make a guess that if you are west of the Cascades you have very soft water, probably slightly acidic (unless the water authority is adding something to increase pH, common with very soft water). But confirmation would be good so we don't mislead. GH and pH are the crucial params hewre.
I would definitely increase the numbers of the shoaling fish (tetras and cories), since you have the space and this will definitely help the fish. Rummynose especially need a much larger group, I would say 15 absolute minimum and 20-25 ideal. The Emperor Tetra you might want to hold on, until you have the rest of the species decided, as this species can sometimes get quite feisty, I had to give mine away a few years ago after they decided to terrorize all the other characins in a 5-foot tank.
Cories, definitely aim for around 20-30 in this tank, the same species or mixed, up to you, but if mixed try for several (5-6) of each species. Do you have the actual "julii" cory, or
C. trinlineatus? The latter is almost always the actual species for "julii;" only today I was looking at a tank of "julii" cories in one of the better local fish stores and no question but they were actually
C. trilineatus, not
C. julii. Doesn't really matter, both are handsome little cories with identical requirements. They do need a sand substrate.
On the Bolivian Ram--I've no idea of your experience/knowledge, so if this is old news, just move over it. This fish must select its mate and bond, or two are3 likely to not get along, and one being dead before long is usually the outcome. A male can be kept alone in a community tank and is an excellent cichlid. Or a pair if they have bonded from within a group (such as in the store tank).
