hi mate
Its an old tank that I gave to a member on here Kneish when I moved in with my wife. It is 60x30x24 and was pretty decent.
No permit required for rays. I struggled with that one in getting it to feed
wish i still have the tank or something similar in size
I've had a couple of larger fire eels in my life and they all took frozen prawns, mussels and silversides along with earthworms. From memory got them feeding initially on earthworms