I really think the space is a concern.. just out of curiosity.. did you just start fish keeping.. cause when I just had started.. even I over stocked my 2 feet tank with 7 types of gouramis .. and I had got an eel too.. but to my lack of knowledge. I had no sinking food.. as they are bottom dwellers.. and the whole over crowding sort of made a bad water condition.. and the eel died.. although the fishes were fine..
btw.. I just read some about that eel you have.. it reaches massive sizes.. and the females are a little plumper than the male eels
of course some pics would be nice