I just recently found out about them so I had to get one. Luckily I had an empty 180 gallon for it. And I was fortunate to find someone who had 1 left and he gave me a pretty good deal on it.
Incredibly jealous. It'll be a good while before I can consider getting what will be my 5th fire eel and hopefully finally a tank capable of housing one. My last 2 were in my 200litre aquarium until I decided that I didn't think it was suitable for them anymore, finally out of education and by next month will be job searching, then I can start looking to save up for the setup and fish that I want. Going to be difficult balancing tank size and cost though, house is kind of small and cost prohibits too large of a tank.