Eels? I'm personally a fan of the fire eel and other spiny eels, australian long fin, etc. You could also do piranhas. Depends on the laws in your state, though
Decides to move my 10 in blue diamond rhom piranha in there....he has torn up plants ocasionally before so we will see how this goes lol.....thanks everyone
Its not about the fish really.. its about the plants.. instead of compromising my advice is to spend some money on big plants.. i keep a 30"+ arowana and eel and stingrays etc in a pretty heavily planted tank..