I would completely agree with fishonfishonfish. There are too many people on this forum that keep fish in inappropriate setups - either give the fish the space it needs or don't keep it, plain and simple. We're talking about living things, and IMO the relationship goes both ways. It's providing you with entertainment, enjoyment, whatever you want to call it - you should strive to do the same.
A few stocking ideas I played around with for you:
- Oscar pair with a few smaller schooling catfish for the bottom
- Severums and some assorted dwarf plecos
- Planted tank with discus and tetras
- Planted tank with angelfish, rams, and corydoras
- Lake Tanganyika tank
- Barb and loach tank
- Upper jaw bichirs and congo tetras
- Rainbowfish
- Geophagus
OR - you could go saltwater, which would be a lot more expensive but an option. If it were a reef tank, I'd probably go with something like:
- 2 medium-sized fish (max of 8 or 9") - these could be Zebrasoma/Ctenochaetus tangs, Genicanthus angels, a combination of those two, or something else
- 5-7 small fish (max of about 3") - these could be a combination of anything really, ideas might be clownfish, cardinalfish, chromis, and reef-safe wrasses
- 3 bottom dwellers (max of about 3") - fish like gobies, dartfish, blennies, etc
- And then depending on what your lighting system is, you could keep whatever assortment of corals you wanted, plus anemones and/or clams
Just a few ideas for you. You could have an awesome tank, just not with the fish that you have currently. Sorry to say, but it just won't work out.