Here is my 240g tank at my office with wild discus, rummynose- 100, cardinals - 100, buenos airies tetras- 30, red spotted Guyana angels - 15, Tefe Green discus - 5-5.5"- 4, Semi Royal Brazil Cupeira Discus - 4.5"-2 and apistos.
Red shadows are the office lights above the tank.