Fire Eels are interesting fish (not really an eel), but you don't see people keeping them at home very often. If you get them while they are young they can be kept in most community tanks. If they are small (5" or less) they should be good in tanks as little as twenty gallons. Your 55 gallon should be good for a while but your fish may outgrow it fairly quickly.
They are mostly peaceful but will tend to burrow in your substrate and move plants around. They like a sandy substrate best and will frequently bury themselves with nothing but their head exposed.
It is important to remember that these fish can grow quite large. They have been found over 3 foot long in the wild (typically under 20-22 inches in aquariums). When your fire eels grow larger they will eat fish that they can fit in their mounths so you must make sure that their tankmates are large enough to avoid becoming part of the eel's diet. I've seen them housed with cichlids and decent sized plecos without a problem.
Please post pics when you get your fish. They are really very interesting.
A forum community dedicated to Aquarium owners and enthusiasts. Come join the discussion about collections, displays, product reviews, accessories, classifieds, breeding, health, behavior, housing, care, and more!