I have a 5ftx2x2 tank.
6 x Discus (had them for about 5 years)
2 x Angels (had intially bought 4 in the past 6 months, but sadly only 1 had survived. Then decided to buy 2 smaller albino angels but 1 only suvived, the other died due to bullying from the other larger Angel)
2 x Electric yellows...